氏名

ミゾカワ タカシ

溝川 貴司

職名

教授

所属

(先進理工学部)

連絡先

メールアドレス

メールアドレス
mizokawa@waseda.jp

URL等

WebページURL

http://www.f.waseda.jp/mizokawa/

研究者プロファイリング(Pure)
Scival
研究者番号
90251397
ORCID ID
0000-0002-7682-2348

本属以外の学内所属

兼担

理工学術院(大学院先進理工学研究科)

学内研究所等

各務記念材料技術研究所

兼任研究員 2017年-2018年

理工学術院総合研究所(理工学研究所)

兼任研究員 2018年-

ホリスティック物理学研究所

研究所員 2015年-2019年

ホリスティック物理学研究所

研究所員 2019年-

学歴・学位

学位

理学(博士) 論文 東京大学 物性II

所属学協会

日本物理学会

日本放射光学会

研究分野

キーワード

強相関電子系、光電子分光

科研費分類

数物系科学 / 物理学 / 物性I

数物系科学 / 物理学 / 物性II

論文

Metallic phase in stoichiometric CeOBiS 2 revealed by space-resolved ARPES

Sugimoto, T.; Sugimoto, T.; Sugimoto, T.; Paris, E.; Wakita, T.; Terashima, K.; Yokoya, T.; Barinov, A.; Kajitani, J.; Higashinaka, R.; Matsuda, T. D.; Aoki, Y.; Mizokawa, T.; Saini, N. L.

Scientific Reports8(1)2018年12月-2018年12月 

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概要:© 2018 The Author(s). Recently CeOBiS 2 system without any fluorine doping is found to show superconductivity posing question on its origin. Using space resolved ARPES we have found a metallic phase embedded in the morphological defects and at the sample edges of stoichiometric CeOBiS 2 . While bulk of the sample is semiconducting, the embedded metallic phase is characterized by the usual electron pocket at X point, similar to the Fermi surface of doped BiS 2 -based superconductors. Typical size of the observed metallic domain is larger than the superconducting correlation length of the system suggesting that the observed superconductivity in undoped CeOBiS 2 might be due to this embedded metallic phase at the defects. The results also suggest a possible way to develop new systems by manipulation of the defects in these chalcogenides with structural instability.

V 2p core-level spectroscopy of V2+/V3+mixed valence AV10O15(A = Ba, Sr) and Ba0.9Sr0.1V13O18

Dash, S.; Kajita, T.; Yoshino, T.; Saini, N. L.; Katsufuji, T.; Mizokawa, T.

Journal of Electron Spectroscopy and Related Phenomena223p.11 - 202018年02月-2018年02月 

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ISSN:03682048

概要:© 2017 Elsevier B.V. We have studied the surface electronic structure of AV 10 O 15 (A = Ba, Sr) and Ba 0.9 Sr 0.1 V 13 O 18 by using x-ray photoemission spectroscopy (XPS). The V 2p XPS shows multiple peaks associated with the charge fluctuation in the system. The relative intensity of each valence component can be extracted by Gaussian and Voigt fittings. The result strongly depends on the number of Gaussians/Voigts. In BaV 10 O 15 and Ba 0.9 Sr 0.1 V 13 O 18 , the surface state has more V 3+ than the bulk. In addition to the presence of surface V 3+ , the V 2.5+ in AV 10 O 15 (A = Ba, Sr) and V 2+ in Ba 0.9 Sr 0.1 V 13 O 18 systems are observed even in the surface sensitive XPS. The number of Gaussians/Voigts should be as large as four for the V 2p 3/2 , in order to obtain the results consistent with the bulk sensitive HAXPES study.

Systematic charge distribution changes in Bi- and Pb-3d transition metal perovskites

Azuma, Masaki; Sakai, Yuki; Nishikubo, Takumi; Mizumaki, Masaichiro; Watanuki, Tetsu; Mizokawa, Takashi; Oka, Kengo; Hojo, Hajime; Naka, Makoto

Dalton Transactions47(5)p.1371 - 13772018年01月-2018年01月 

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ISSN:14779226

概要:© 2018 The Royal Society of Chemistry. Charge distribution changes in Bi- and Pb-3d transition metal perovskite type oxides were examined by comprehensive precise structural analysis, spectroscopy, and theoretical investigations. The change in the depth of the d level of the transition metal caused the intermetallic charge transfer. A temperature-induced charge-transfer transition in chemically modified BiNiO 3 results in technologically important negative thermal expansion.

Interplay between spin-orbit interaction and stripe-type charge-orbital order of IrTe2

Ootsuki, Daiki; Ishii, Hiroyuki; Kudo, Kazutaka; Nohara, Minoru; Arita, Masashi; Namatame, Hirofumi; Taniguchi, Masaki; Saini, Naurang L.; Mizokawa, Takashi

Journal of Physics and Chemistry of Solids2018年01月-2018年01月 

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ISSN:00223697

概要:© 2018 Elsevier Ltd. We have studied the electronic structure of the stripe-type charge-orbital ordered phase of IrTe 2 by means of angle-resolved photoemission spectroscopy. An electron pocket at the Brillouin zone boundary and hole Fermi surfaces around its center are clearly observed in agreement with the band structure calculation for the stripe-type charge-orbital ordered phase. The present study indicates that the hole and electron Fermi surfaces can survive due to the strong Te 5p spin-orbit coupling even under the charge-orbital order. The participant of the Te 5p orbitals to the conduction band provides an interesting interplay between the charge-orbital order and the spin-orbit interaction in IrTe 2 .

Distinct local structure of superconducting Ca10M4As8(Fe2As2)5 (M=Pt,Ir)

Paris, E.; Wakita, T.; Proux, O.; Proux, O.; Yokoya, T.; Kudo, K.; Mitsuoka, D.; Kimura, T.; Fujimura, K.; Nishimoto, N.; Ioka, S.; Nohara, M.; Mizokawa, T.; Saini, N. L.

Physical Review B96(22)2017年12月-2017年12月 

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ISSN:24699950

概要:© 2017 American Physical Society. We have studied the local structure of superconducting Ca10Pt4As8(Fe2As2)5 (Pt10418) and Ca10Ir4As8(Fe2As2)5 (Ir10418) iron arsenides, showing different transition temperatures (Tc=38 and 16 K, respectively), by polarized Fe K-edge extended x-ray absorption fine-structure measurements. Despite the similar average crystal structures, the local structures of the FeAs4 tetrahedra in the two compounds are found to be very different. The FeAs4 in Pt10418 is close to a regular tetrahedron, while it deviates largely in Ir10418. The Fe-Fe correlations in the two compounds are characterized by similar bond-length characteristics; however, the static disorder in Pt10418 is significantly lower than that in Ir10418. The results suggest that the optimized local structure and reduced disorder are the reasons for higher Tc and well-defined electronic states in Pt10418 unlike Ir10418 showing the coexistence of glassy and normal electrons at the Fermi surface, and hence provide direct evidence of the local-structure-driven optimization of the electronic structure and superconductivity in iron arsenides.

A novel one-dimensional electronic state at IrTe2Surface

Ootsuki, Daiki; Ishii, Hiroyuki; Kudo, Kazutaka; Nohara, Minoru; Takahashi, Masaya; Horio, Masafumi; Fujimori, Atsushi; Yoshida, Teppei; Arita, Masashi; Anzai, Hiroaki; Namatame, Hirofumi; Taniguchi, Masaki; Taniguchi, Masaki; Saini, Naurang L.; Mizokawa, Takashi

Journal of the Physical Society of Japan86(12)2017年12月-2017年12月 

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ISSN:00319015

概要:© 2017 The Physical Society of Japan. Highly one-dimensional (1D) Fermi sheets are realized at the surface of a layered Ir telluride IrTe 2 which exhibits a stripe-type charge and orbital order below ∼280 K. The 1D Fermi sheets appear in the low temperature range where the stripe order is well established. The 1D Fermi sheets are truncated by the bulk Fermi surfaces, and the spectral weight suppression at the Fermi level deviates from the typical Tomonaga–Luttinger behavior. The 1D band runs along the stripe and is accompanied by several branches which can be derived from the quantization in the perpendicular direction.

Electronic structure and polar catastrophe at the surface of Lix CoO2 studied by angle-resolved photoemission spectroscopy

Okamoto, Y.; Matsumoto, R.; Yagihara, T.; Iwai, C.; Miyoshi, K.; Takeuchi, J.; Horiba, K.; Kobayashi, M.; Ono, K.; Kumigashira, H.; Saini, N. L.; Mizokawa, T.

Physical Review B96(12)2017年09月-2017年09月 

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ISSN:24699950

概要:© 2017 American Physical Society. We report an angle-resolved photoemission spectroscopy (ARPES) study of LixCoO2 single crystals which have a hole-doped CoO2 triangular lattice. Similar to NaxCoO2, the Co 3da1g band crosses the Fermi level with strongly renormalized band dispersion while the Co 3deg′ bands are fully occupied in LixCoO2 (x=0.46 and 0.71). At x=0.46, the Fermi surface area is consistent with the bulk hole concentration indicating that the ARPES result represents the bulk electronic structure. On the other hand, at x=0.71, the Fermi surface area is larger than the expectation which can be associated with the inhomogeneous distribution of Li reported in the previous scanning tunneling microscopy study by Iwaya et al. [Phys. Rev. Lett. 111, 126104 (2013)PRLTAO0031-900710.1103/PhysRevLett.111.126104]. However, the Co 3d peak is systematically shifted towards the Fermi level with hole doping excluding phase separation between hole rich and hole poor regions in the bulk. Therefore, the deviation of the Fermi surface area at x=0.71 can be attributed to hole redistribution at the surface avoiding polar catastrophe. The bulk Fermi surface of Co 3da1g is very robust around x=0.5 even in the topmost CoO2 layer due to the absence of the polar catastrophe.

Orbital order and fluctuations in the two-leg ladder materials BaFe2X3 (X= S and Se) and CsFe2Se3

Takubo, Kou; Yokoyama, Yuichi; Wadati, Hiroki; Iwasaki, Shun; Mizokawa, Takashi; Boyko, Teak; Sutarto, Ronny; He, Feizhou; Hashizume, Kazuki; Imaizumi, Satoshi; Aoyama, Takuya; Imai, Yoshinori; Ohgushi, Kenya

Physical Review B96(11)2017年09月-2017年09月 

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ISSN:24699950

概要:© 2017 American Physical Society. The electronic structure of BaFe2X3 (X = S and Se) and CsFe2Se3 in which two-leg ladders are formed by the Fe sites are studied by means of x-ray absorption and resonant inelastic x-ray scattering spectroscopy. The x-ray absorption spectra at the Fe L edges for BaFe2X3 exhibit two components, indicating that itinerant and localized Fe 3d sites coexist. Substantial x-ray linear dichroism is observed in polarization dependent spectra, indicating the existence of orbital order or fluctuation in the Fe ladder even above the Néel temperature TN. Direct exchange interaction along the legs of the Fe ladder stabilizes the orbital and antiferromagnetic orders in BaFe2S3, while the ferromagnetic molecular orbitals are realized between the rungs in CsFe2Se3.

Ultrafast Electronic Band Gap Control in an Excitonic Insulator

Mor, Selene; Herzog, Marc; Herzog, Marc; GoleŽ, Denis; Werner, Philipp; Eckstein, Martin; Katayama, Naoyuki; Nohara, Minoru; Takagi, Hide; Takagi, Hide; Mizokawa, Takashi; Monney, Claude; Stähler, Julia

Physical Review Letters119(8)2017年08月-2017年08月 

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ISSN:00319007

概要:© 2017 American Physical Society. We report on the nonequilibrium dynamics of the electronic structure of the layered semiconductor Ta2NiSe5 investigated by time- and angle-resolved photoelectron spectroscopy. We show that below the critical excitation density of FC=0.2 mJ cm-2, the band gap narrows transiently, while it is enhanced above FC. Hartree-Fock calculations reveal that this effect can be explained by the presence of the low-temperature excitonic insulator phase of Ta2NiSe5, whose order parameter is connected to the gap size. This work demonstrates the ability to manipulate the band gap of Ta2NiSe5 with light on the femtosecond time scale.

Orbital-dependent band renormalization in BaNi2(As1−xPx)2(x = 0.00 and 0.092)

Noda, Tomohiro; Kudo, Kazutaka; Takasuga, Masaya; Nohara, Minoru; Sugimoto, Takuya; Ootsuki, Daiki; Kobayashi, Masaki; Horiba, Koji; Ono, Kanta; Kumigashira, Hiroshi; Fujimori, Atsushi; Saini, Naurang L.; Mizokawa, Takashi

Journal of the Physical Society of Japan86(6)2017年06月-2017年06月 

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ISSN:00319015

概要:© 2017 The Physical Society of Japan We have studied the multi-band electronic structure of BaNi 2 (As 1 − x P x ) 2 (x = 0.00 and 0.092) in which the P substitution suppresses unusual Ni–Ni zigzag bond order and induces strong coupling superconductivity. At x = 0.092, all the Fermi surfaces predicted by the ab-initio band calculations are successfully identified including the small electron pocket around the Z point. Interestingly, whereas the Ni 3d xy and x 2 − y 2 bands crossing E F agree with the band calculations, the Ni 3d yz=zx bands around 1 eV below the Fermi level (E F ) are moderately renormalized similar to those in the Fe-based superconductors. The orbital-dependent band renormalization in BaNi 2 (As 1 − x P x ) 2 indicates that the less correlated xy and x 2 − y 2 bands play important roles in the strong coupling superconductivity. Across the Ni–Ni bond order at x = 0.00, the less correlated Ni 3d xy and x 2 − y 2 bands near E F are selectively reconstructed across the Ni–Ni bond order. The band reconstruction is consistent with the orbital-selective Peierls instability proposed by Streltsov and Khomskii [Phys. Rev. B 89, 161112(R) (2014)], in which the itinerant orbital sector governs the structural instability and fluctuations.

Orbital-Dependent Band Renormalization in BaNi2(As1−xPx)2(x= 0.00 and 0.092)

Noda Tomohiro;Kudo Kazutaka;Takasuga Masaya;Nohara Minoru;Sugimoto Takuya;Ootsuki Daiki;Kobayashi Masaki;Horiba Koji;Ono Kanta;Kumigashira Hiroshi;Fujimori Atsushi;Saini Naurang L.;Mizokawa Takashi

Journal of the Physical Society of Japan86(6)2017年05月-2017年05月 

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ISSN:0031-9015

Electronic properties of Ba1-xSrx V13 O18 (x=0,0.2,1) studied using hard x-ray photoelectron spectroscopy

Dash, S.; Okawa, M.; Kajita, T.; Yoshino, T.; Shimoyama, R.; Takahashi, K.; Takahashi, Y.; Takayanagi, R.; Saitoh, T.; Ootsuki, D.; Yoshida, T.; Ikenaga, E.; Saini, N. L.; Katsufuji, T.; Mizokawa, T.

Physical Review B95(19)2017年05月-2017年05月 

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ISSN:24699950

概要:© 2017 American Physical Society. We have studied the electronic structure of Ba1-xSrxV13O18 (x=0,0.2,1) at different temperatures across the trimerization and charge-order transitions using hard x-ray photoemission spectroscopy (HAXPES). The V 2p HAXPES indicates V2+/V3+ charge order and fluctuation in the high-temperature tetramer phase, low-temperature trimer phase, and intermediate-temperature charge-order phase in the series of x=0,0.2,1. In the valence-band HAXPES, although the spectral weight at the Fermi level tends to be suppressed in all the phases due to strong charge order or fluctuation, it increases in the trimer phase at x=0.2, in agreement with the decrease of resistivity and the increase of itinerant electrons in the trimer phase. Interestingly, in the most conducting x=1 without the charge-order phase, the spectral weight at the Fermi level is strongly suppressed even in the trimer phase, indicating that charge fluctuation in the trimer phase is different between x=0.2 and 1.

Role of the local structure in superconductivity of Lao0.5F0.5BiS2-xSexsystem

Paris, E.; Paris, E.; Mizuguchi, Y.; Hacisalihoglu, M. Y.; Hacisalihoglu, M. Y.; Hiroi, T.; Joseph, B.; Aquilanti, G.; Miura, O.; Mizokawa, T.; Saini, N. L.

Journal of Physics Condensed Matter29(14)2017年03月-2017年03月 

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ISSN:09538984

概要:© 2017 IOP Publishing Ltd. We have studied the local structure of LaO 0.5 F 0.5 BiS 2-x Se x by Bi L 1 -edge extended x-ray absorption fine structure (EXAFS). We find a significant effect of Se substitution on the local atomic correlations with a gradual elongation of average in-plane Bi-S bondlength. The associated mean square relative displacement, measuring average local distortions in the BiS 2 plane, hardly shows any change for small Se substitution, but decreases significantly for . The Se substitution appears to suppress the local distortions within the BiS 2 plane that may optimize in-plane orbital hybridization and hence the superconductivity. The results suggest that the local structure of the BiS 2 -layer is one of the key ingredients to control the physical properties of the BiS 2 -based dichalcogenides.

A-Site and B-Site Charge Orderings in an s-d Level Controlled Perovskite Oxide PbCoO3

Sakai, Yuki; Yang, Junye; Yu, Runze; Hojo, Hajime; Yamada, Ikuya; Miao, Ping; Lee, Sanghyun; Torii, Shuki; Kamiyama, Takashi; Kamiyama, Takashi; Ležaić, Marjana; Bihlmayer, Gustav; Mizumaki, Masaichiro; Komiyama, Jun; Mizokawa, Takashi; Yamamoto, Hajime; Nishikubo, Takumi; Hattori, Yuichiro; Oka, Kengo; Yin, Yunyu; Dai, Jianhong; Li, Wenmin; Ueda, Shigenori; Ueda, Shigenori; Aimi, Akihisa; Mori, Daisuke; Inaguma, Yoshiyuki; Hu, Zhiwei; Uozumi, Takayuki; Jin, Changqing; Jin, Changqing; Jin, Changqing; Long, Youwen; Long, Youwen; Azuma, Masaki

Journal of the American Chemical Society139(12)p.4574 - 45812017年03月-2017年03月 

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ISSN:00027863

概要:© 2017 American Chemical Society. Perovskite PbCoO 3 synthesized at 12 GPa was found to have an unusual charge distribution of Pb 2+ Pb 4+ 3 Co 2+ 2 Co 3+ 2 O 12 with charge orderings in both the A and B sites of perovskite ABO 3 . Comprehensive studies using density functional theory (DFT) calculation, electron diffraction (ED), synchrotron X-ray diffraction (SXRD), neutron powder diffraction (NPD), hard X-ray photoemission spectroscopy (HAXPES), soft X-ray absorption spectroscopy (XAS), and measurements of specific heat as well as magnetic and electrical properties provide evidence of lead ion and cobalt ion charge ordering leading to Pb 2+ Pb 4+ 3 Co 2+ 2 Co 3+ 2 O 12 quadruple perovskite structure. It is shown that the average valence distribution of Pb 3.5+ Co 2.5+ O 3 between Pb 3+ Cr 3+ O 3 and Pb 4+ Ni 2+ O 3 can be stabilized by tuning the energy levels of Pb 6s and transition metal 3d orbitals.

Unusual valence state and metal-insulator transition in BaV10 O15 probed by hard x-ray photoemission spectroscopy

Yoshino, T.; Okawa, M.; Kajita, T.; Dash, S.; Shimoyama, R.; Takahashi, K.; Takahashi, Y.; Takayanagi, R.; Saitoh, T.; Ootsuki, D.; Yoshida, T.; Ikenaga, E.; Saini, N. L.; Katsufuji, T.; Mizokawa, T.

Physical Review B95(7)2017年02月-2017年02月 

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ISSN:24699950

概要:© 2017 American Physical Society. We have studied the electronic structure of BaV10O15 across the metal-insulator transition with V trimerization by means of hard-x-ray photoemission spectroscopy (HAXPES) and mean-field calculations. The V 2p HAXPES indicates V2.5+-V3+ charge fluctuation in the metallic phase, and V2+-V3+ charge order in the insulating phase. The V2.5+-V3+ charge fluctuation is consistent with the mean-field solution where a V 3d a1g electron is shared by two V sites with face-sharing VO6 octahedra. The valence-band HAXPES of the metallic phase exhibits pseudogap opening at the Fermi level associated with the charge fluctuation, and a band gap ∼200 meV is established in the insulating phase due to the switching of charge correlation.

Electronic structure of self-doped layered Eu3 F4Bi2 S4 material revealed by x-ray absorption spectroscopy and photoelectron spectromicroscopy

Paris, E.; Sugimoto, T.; Sugimoto, T.; Sugimoto, T.; Wakita, T.; Barinov, A.; Terashima, K.; Kandyba, V.; Proux, O.; Kajitani, J.; Higashinaka, R.; Matsuda, T. D.; Aoki, Y.; Yokoya, T.; Mizokawa, T.; Saini, N. L.

Physical Review B95(3)2017年01月-2017年01月 

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ISSN:24699950

概要:© 2017 American Physical Society. We have studied the electronic structure of Eu3F4Bi2S4 using a combination of Eu L3-edge x-ray absorption spectroscopy (XAS) and space-resolved angle-resolved photoemission spectroscopy (ARPES). From the Eu L3-edge XAS, we have found that the Eu in this system is in mixed valence state with coexistence of Eu2+/Eu3+. The bulk charge doping was estimated to be ∼0.3 per Bi site in Eu3F4Bi2S4, which corresponds to the nominal x in a typical REO1-xFxBiS2 system (RE: rare-earth elements). From the space-resolved ARPES, we have ruled out the possibility of any microscale phase separation of Eu valence in the system. Using a microfocused beam we have observed the band structure as well as the Fermi surface that appeared similar to other compounds of this family with disconnected rectangular electronlike pockets around the X point. The Luttinger volume analysis gives the effective carrier to be 0.23 electrons per Bi site in Eu3F4Bi2S4, indicating that the system is likely to be in the underdoped region of its superconducting phase diagram.

High resolution x-ray absorption and emission spectroscopy of LixCoO2 single crystals as a function delithiation

Simonelli, L.; Simonelli, L.; Paris, E.; Paris, E.; Iwai, C.; Miyoshi, K.; Takeuchi, J.; Mizokawa, T.; Mizokawa, T.; Saini, N. L.

Journal of Physics Condensed Matter29(10)2017年01月-2017年01月 

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ISSN:09538984

概要:© 2017 IOP Publishing Ltd. The effect of delithiation in Li x CoO 2 is studied by high resolution Co K-edge x-ray absorption and x-ray emission spectroscopy. Polarization dependence of the x-ray absorption spectra on single crystal samples is exploited to reveal information on the anisotropic electronic structure. We find that the electronic structure of Li x CoO 2 is significantly affected by delithiation in which the Co ions oxidation state tending to change from 3+ to 4+. The Co intersite (intrasite) 4p-3d hybridization suffers a decrease (increase) by delithiation. The unoccupied 3d t 2g orbitals with a 1g symmetry, containing substantial O 2p character, hybridize isotropically with Co 4p orbitals and likely to have itinerant character unlike anisotropically hybridized 3d e g orbitals. Such a peculiar electronic structure could have significant effect on the mobility of Li in Li x CoO 2 cathode and hence the battery characteristics.

Bayesian approach to effective model of NiGa2S4 triangular lattice with Boltzmann factor

Takenaka, Hikaru; Nagata, Kenji; Nagata, Kenji; Nagata, Kenji; Mizokawa, Takashi; Okada, Masato; Okada, Masato

Journal of the Physical Society of Japan85(12)2016年12月-2016年12月 

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ISSN:00319015

概要:©2016 The Physical Society of Japan.We propose a method for inducting the Boltzmann factor to extract effective classical spin Hamiltonians from meanfield-type electronic structural calculations by means of the Bayesian inference. This method enables us to compare electronic structural calculations with experiments according to the classical model at a finite temperature. Application of this method to the unrestricted Hartree-Fock calculations for NiGa2S4 led to the estimation that the superexchange interaction between the nearest neighbor sites is ferromagnetic at low temperature, which is consistent with magnetic experiment results. This supports the theory that competition between the antiferromagnetic third neighbor interaction and ferromagnetic nearest neighbor interaction may lead to the quantum spin liquid in NiGa2S4.

Bayesian Approach to Effective Model of NiGa2S4Triangular Lattice with Boltzmann Factor

Takenaka Hikaru;Nagata Kenji;Mizokawa Takashi;Okada Masato

Journal of the Physical Society of Japan85(12)2016年11月-2016年11月 

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ISSN:0031-9015

Localized and mixed valence state of Ce 4f in superconducting and ferromagnetic CeO1-x FxBiS2 revealed by x-ray absorption and photoemission spectroscopy

Sugimoto, T.; Sugimoto, T.; Ootsuki, D.; Ootsuki, D.; Paris, E.; Paris, E.; Iadecola, A.; Salome, M.; Schwier, E. F.; Iwasawa, H.; Shimada, K.; Asano, T.; Higashinaka, R.; Matsuda, T. D.; Aoki, Y.; Saini, N. L.; Mizokawa, T.

Physical Review B - Condensed Matter and Materials Physics94(8)2016年08月-2016年08月 

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ISSN:10980121

概要:©2016 American Physical Society.We have performed Ce L3-edge x-ray absorption spectroscopy (XAS) and Ce 4d-4f resonant photoemission spectroscopy (PES) on single crystals of CeO1-xFxBiS2 for x=0.0 and 0.5 in order to investigate the Ce 4f electronic states. In Ce L3-edge XAS, a mixed valence of Ce was found in the x=0.0 sample, and F doping suppressed it, which is consistent with the results on polycrystalline samples. As for resonant PES, we found that the Ce 4f electrons in both x=0.0 and 0.5 systems respectively formed a flat band at 1.0 and 1.4 eV below the Fermi level and there was no contribution to the Fermi surfaces. Interestingly, Ce valence in CeOBiS2 deviates from Ce3+ even though Ce 4f electrons are localized, indicating the Ce valence is not in a typical valence fluctuation regime. We assume that localized Ce 4f in CeOBiS2 is mixed with unoccupied Bi 6pz, which is consistent with a previous local structural study. Based on the analysis of the Ce L3-edge XAS spectra using Anderson's impurity model calculation, we found that the transfer integral becomes smaller, increasing the number of Ce 4f electrons upon the F substitution for O.

A study of temperature dependent local atomic displacements in a Ba(Fe1-xCox)2As2 superconductor

Hacisalihoglu, M. Y.; Hacisalihoglu, M. Y.; Hacisalihoglu, M. Y.; Paris, E.; Paris, E.; Joseph, B.; Joseph, B.; Simonelli, L.; Sato, T. J.; Mizokawa, T.; Saini, N. L.

Physical Chemistry Chemical Physics18(13)p.9029 - 90352016年04月-2016年04月 

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ISSN:14639076

概要:© the Owner Societies 2016.We have studied the local structure of a Ba(Fe1-xCox)2As2 superconductor using temperature dependent extended X-ray absorption fine structure (EXAFS) measurements. Polarized EXAFS at the Fe K-edge on an optimally doped (x = 0.06) single crystal has permitted us to determine atomic displacements across the superconducting transition temperature (Tc). The Fe-As bondlength hardly shows any change with temperature; however, the Fe-Fe sublattice reveals a sharp anomaly across Tc, indicated by a significant drop in mean square relative displacements, similar to the one known for cuprates and A15-type superconductors. We have also found a large atomic disorder around the substituted Co, revealed by polarized Co K-edge EXAFS measurements. The Co-Fe/Co bonds are more flexible than the Fe-Fe bonds with the As-height in Co-containing tetrahedra being larger than the one in FeAs4. The results suggest that the local Fe-Fe bondlength fluctuations and the atomic disorder in this sub-lattice should have some important role in the superconductivity of Ba(Fe1-xCox)2As2 pnictides.

Pressure dependence of the local structure of iridium ditelluride across the structural phase transition

Paris, E.; Paris, E.; Joseph, B.; Joseph, B.; Iadecola, A.; Marini, C.; Ishii, H.; Kudo, K.; Pascarelli, S.; Nohara, M.; Mizokawa, T.; Mizokawa, T.; Saini, N. L.

Physical Review B - Condensed Matter and Materials Physics93(13)2016年04月-2016年04月 

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ISSN:10980121

概要:© 2016 American Physical Society.The local structure of IrTe2 has been studied by iridium L3-edge x-ray absorption spectroscopy (XAS) measurements as a function of pressure, performed at two temperatures (100 and 295 K) across the structural phase transition at ∼270 K. Extended x-ray absorption fine structure (EXAFS) and x-ray absorption near-edge structure (XANES) spectra show pressure-dependent anomalies, suggesting phase transitions that are characterized by different local atomic displacements. The high-temperature phase of IrTe2 (trigonal at 295 K) reveals a clear anomaly in the Ir-Te correlations at ∼4 GPa, while the low-temperature phase (at 100 K) shows a smaller change at ∼6 GPa, likely to be associated with transitions in lower-symmetry phases. XANES spectra, measuring higher-order atomic correlations, also show nonlinear pressure dependence in the local geometry at the anomalous pressures. These nonlinear changes suggest that IrTe2 goes through lower local symmetry phases with increasing pressure.

Temperature Dependent Local Structure of NaxCoO2 Cathode Material for Rechargeable Sodium-Ion Batteries

Olszewski, Wojciech; Olszewski, Wojciech; Ávila Pérez, Marta; Marini, Carlo; Paris, Eugenio; Paris, Eugenio; Wang, Xianfen; Iwao, Tatsumi; Okubo, Masashi; Yamada, Atsuo; Mizokawa, Takashi; Saini, Naurang Lal; Simonelli, Laura

Journal of Physical Chemistry C120(8)p.4227 - 42322016年03月-2016年03月 

DOIScopus

詳細

ISSN:19327447

概要:© 2016 American Chemical Society.We have investigated the local structure of differently charged NaxCoO2 cathode material as a function of temperature by Co K-edge X-ray absorption fine structure (EXAFS) measurements. We have found that the charge/discharge process has a direct effect on the bond characteristics of the cathode in the Na-ion batteries. The results reveal that the local Co-O bonds get softer, while the Co-Co bonds hardly show any change during discharge (sodiation). The present study underlines the key role of local atomic displacements in diffusion and the reversibility of ions in cathodes for batteries and points toward the feasibility of NaxCoO2 to be used as a cathode material. The results are discussed in comparison with the lithiation/delithiation of LixCoO2 battery materials.

Mesoscopic Stripes in Antiferromagnetic Fe Chalcogenide Probed by Scanning Photoelectron Spectromicroscopy

Mizokawa Takashi;Bendele Markus;Barinov Alexei;Iadecola Antonella;Joseph Boby;Noji Takashi;Koike Yoji;Saini Naurang L.

Journal of the Physical Society of Japan85(3)2016年02月-2016年02月 

CiNii

詳細

ISSN:0031-9015

Determination of the local structure of CsBi4-: XPbxTe6 (x = 0, 0.5) by X-ray absorption spectroscopy

Wakita, Takanori; Paris, Eugenio; Paris, Eugenio; Mizokawa, Takashi; Hacisalihoǧlu, Muammer Yasin; Hacisalihoǧlu, Muammer Yasin; Terashima, Kensei; Okazaki, Hiroyuki; Proux, Olivier; Proux, Olivier; Kieffer, Isabelle; Kieffer, Isabelle; Lahera, Eric; Lahera, Eric; Del Net, William; Del Net, William; Olivi, Luca; Takano, Yoshihiko; Muraoka, Yuji; Yokoya, Takayoshi; Saini, Naurang L.

Physical Chemistry Chemical Physics18(36)p.25136 - 251422016年01月-2016年01月 

DOIScopus

詳細

ISSN:14639076

概要:© 2016 the Owner Societies.We have studied the local structure and valence electronic unoccupied states of thermoelectric CsBi4Te6 and superconducting CsBi3.5Pb0.5Te6 (Tc ∼ 3 K) by extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) measurements. The Bi-L3 edge EXAFS reveals wide Bi-Te distance distribution for both compounds indicating complex atomic arrangements in the studied system. The mean square relative displacements (MSRDs) of the Bi-Te bond distances appear largely increased in Pb substituted system due to larger overall local disorder, however, one of the Bi-Te bonds shows a reduced disorder. On the other hand, the Bi-L3 edge XANES is hardly affected by Pb substitution while the Te-L1 edge XANES reveals increased density of unoccupied Te 5p states. This suggests that the carriers introduced by the Pb substitution in CsBi4-xPbxTe6 preferentially goes on Te sites. Similarly, the Cs-L3 edge XANES also shows small changes due to Pb-substitution and reduced local disorder indicated by the reduced width of the Cs-L3 edge white line. We have also shown that the X-ray photoemission spectroscopy (XPS) measurements on various electronic core levels are in a qualitative agreement with the XANES results. These findings are consistent with carrier doping and a reduced disorder in one direction to be likely factors to drive the thermoelectric CsBi4Te6 into a bulk superconductor by Pb-substitution in CsBi4-xPbxTe6.

Determination of the local structure of CsBi4-xPbxTe6 (x=0, 0.5) by X-ray absorption spectroscopy

Wakita, Takanori;Paris, Eugenio;Mizokawa, Takashi;Hacisalihoglu, Muammer Yasin;Terashima, Kensei;Okazaki, Hiroyuki;Proux, Olivier;Kieffer, Isabelle;Lahera, Eric;Del Net, William;Olivi, Luca;Takano, Yoshihiko;Muraoka, Yuji;Yokoya, Takayoshi;Saini, Naurang L.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS18(36)p.25136 - 251422016年-2016年

DOIWoS

詳細

ISSN:1463-9076

Bayesian Approach to Effective Model of NiGa2S4 Triangular Lattice with Boltzmann Factor

Takenaka, Hikaru;Nagata, Kenji;Mizokawa, Takashi;Okada, Masato

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN85(12)2016年-2016年

DOIWoS

詳細

ISSN:0031-9015

19aBN-3 Ir_<1-x>Pt_xTe_2の共鳴X線散乱

田久保 耕;和達 大樹;大槻 太毅;溝川 貴司;Sutarto R.;He F.;石井 賢司;山崎 裕一;中尾 裕則;村上 洋一;卞 舜生;工藤 一貴;松尾 元太;石井 博文;小林 正和;野原 実

日本物理学会講演概要集71(0)2016年-2016年

CiNii

詳細

ISSN:2189079X

19aBQ-5 BaFe_2Se_3の電子状態とスピン軌道整列

岩崎 駿;野田 智博;溝川 貴司;青山 拓也;橋詰 一樹;大串 研也;小林 正起;堀場 弘司;小野 寛太;組頭 広志

日本物理学会講演概要集71(0)2016年-2016年

CiNii

詳細

ISSN:2189079X

19pBM-2 三角格子を持つV酸化物の電子状態と軌道電荷整列

吉野 翼;野田 智博;溝川 貴司;大川 万里生;齋藤 智彦;小林 正起;堀場 弘司;小野 寛太;組頭 広志;梶田 倫正;勝藤 拓郎

日本物理学会講演概要集71(0)2016年-2016年

CiNii

詳細

ISSN:2189079X

21aPS-60 Li_xCoO_2の光電子分光

岡本 陽平;野田 智博;溝川 貴司;岩井 千佳;三好 清貴;竹内 潤;小林 正起;堀場 弘司;小野 寛太;組頭 広志

日本物理学会講演概要集71(0)2016年-2016年

CiNii

詳細

ISSN:2189079X

19pBM-2 三角格子を持つV酸化物の電子状態と軌道電荷整列

吉野 翼;野田 智博;溝川 貴司;大川 万里生;齋藤 智彦;小林 正起;堀場 弘司;小野 寛太;組頭 広志;梶田 倫正;勝藤 拓郎

日本物理学会講演概要集71(0)2016年-2016年

CiNii

19aBQ-5 BaFe_2Se_3の電子状態とスピン軌道整列

岩崎 駿;野田 智博;溝川 貴司;青山 拓也;橋詰 一樹;大串 研也;小林 正起;堀場 弘司;小野 寛太;組頭 広志

日本物理学会講演概要集71(0)2016年-2016年

CiNii

19aBN-3 Ir_<1-x>Pt_xTe_2の共鳴X線散乱

田久保 耕;和達 大樹;大槻 太毅;溝川 貴司;Sutarto R.;He F.;石井 賢司;山崎 裕一;中尾 裕則;村上 洋一;卞 舜生;工藤 一貴;松尾 元太;石井 博文;小林 正和;野原 実

日本物理学会講演概要集71(0)2016年-2016年

CiNii

21aPS-60 Li_xCoO_2の光電子分光

岡本 陽平;野田 智博;溝川 貴司;岩井 千佳;三好 清貴;竹内 潤;小林 正起;堀場 弘司;小野 寛太;組頭 広志

日本物理学会講演概要集71(0)2016年-2016年

CiNii

19aPS-27 多軌道d-p模型によるBaFe_2Se_3及びCsFe_2Se_3のスピン軌道秩序

岩崎 駿;溝川 貴司

日本物理学会講演概要集70(2)2015年09月-2015年09月 

CiNii

詳細

ISSN:2189079X

19aPS-97 多軌道d-p模型によるBa_2Ti_<13>O_<22>の電荷軌道秩序

吉野 翼;溝川 貴司

日本物理学会講演概要集70(2)2015年09月-2015年09月 

CiNii

詳細

ISSN:2189079X

16pBB-7 放射光分光で見る強相関遷移金属化合物の電荷移動不安定性

溝川 貴司

日本物理学会講演概要集70(2)p.1545 - 15462015年09月-2015年09月 

CiNii

詳細

ISSN:2189079X

16aDB-5 BaNi_2(As_<1-x>Px)_2の角度分解光電子分光

野田 智博;大槻 太毅;杉本 拓也;堀尾 眞史;藤森 淳;小林 正起;堀場 弘司;小野 寛太;組頭 広志;工藤 一貴;高須賀 政哉;野原 実;Saini N. L.;溝川 貴司

日本物理学会講演概要集70(2)2015年09月-2015年09月 

CiNii

詳細

ISSN:2189079X

16pCD-1 レーザー角度分解光電子分光によるIr_<1-x>Pt_xTe_2の超伝導ギャップの直接観測

大槻 太毅;溝川 貴司;Saini N. L.;大田 由一;山本 遇哲;橋本 嵩広;岡崎 浩三;辛 埴;藤森 淳;鳥山 達矢;小西 建久;太田 幸則;卞 舜生;工藤 一貴;野原 実

日本物理学会講演概要集70(2)2015年09月-2015年09月 

CiNii

詳細

ISSN:2189079X

16pDA-9 Fermi surfaces and orbital polarization of CeO_<0.5>F_<0.5>BiS_2 revealed by angle-resolved photoemission spectroscopy

Sugimoto T.;Ootsuki D.;Morice C.;Artacho E.;Saxena S. S.;Schwier E. F.;Zheng M.;Kojima Y.;Iwasawa H.;Shimada K.;Arita M.;Namatame H.;Taniguchi M.;Takahashi M.;Saini N. L.;Asano T.;Higashinaka R.;Matsuda T. D.;Aoki Y.;Mizokawa T.

日本物理学会講演概要集70(2)2015年09月-2015年09月 

CiNii

詳細

ISSN:2189079X

Electronic structure of Li1+x[Mn0.5Ni0.5]1-xO2 studied by photoemission and x-ray absorption spectroscopy

Yokoyama, Y.; Yokoyama, Y.; Ootsuki, D.; Sugimoto, T.; Wadati, H.; Okabayashi, J.; Yang, Xu; Du, Fei; Chen, Gang; Mizokawa, T.

Applied Physics Letters107(3)2015年07月-2015年07月 

DOIScopus

詳細

ISSN:00036951

概要:© 2015 AIP Publishing LLC. We have studied the electronic structure of Li1+x[Mn0.5Ni0.5]1-xO2 (x = 0.00 and 0.05), one of the promising cathode materials for Li ion battery, by means of x-ray photoemission and absorption spectroscopy. The results show that the valences of Mn and Ni are basically 4+ and 2+, respectively. However, the Mn3+ component in the x = 0.00 sample gradually increases with the bulk sensitivity of the experiment, indicating that the Jahn-Teller active Mn3+ ions are introduced in the bulk due to the site exchange between Li and Ni. The Mn3+ component gets negligibly small in the x = 0.05 sample, which indicates that the excess Li suppresses the site exchange and removes the Jahn-Teller active Mn3+.

Fermi surfaces and orbital polarization in superconducting CeO0.5 F0.5BiS2 revealed by angle-resolved photoemission spectroscopy

Sugimoto, T.; Ootsuki, D.; Morice, C.; Artacho, E.; Artacho, E.; Artacho, E.; Saxena, S. S.; Schwier, E. F.; Zheng, M.; Kojima, Y.; Iwasawa, H.; Shimada, K.; Arita, M.; Namatame, H.; Taniguchi, M.; Taniguchi, M.; Takahashi, M.; Saini, N. L.; Asano, T.; Higashinaka, R.; Matsuda, T. D.; Aoki, Y.; Mizokawa, T.

Physical Review B - Condensed Matter and Materials Physics92(4)2015年07月-2015年07月 

DOIScopus

詳細

ISSN:10980121

概要:© 2015 American Physical Society. We have investigated the electronic structure of BiS2-based CeO0.5F0.5BiS2 superconductor using polarization-dependent angle-resolved photoemission spectroscopy (ARPES), and succeeded in elucidating the orbital characters on the Fermi surfaces. In the rectangular Fermi pockets around the X point, the straight portion parallel to the ky direction is dominated by Bi 6px character. The orbital polarization indicates the underlying quasi-one-dimensional electronic structure of the BiS2 system. Moreover, distortions on tetragonally aligned Bi could give rise to the band Jahn-Teller effect.

The effect of RE substitution in layered REO0.5F0.5BiS2: Chemical pressure, local disorder and superconductivity

Mizuguchi, Y.; Mizuguchi, Y.; Paris, E.; Paris, E.; Sugimoto, T.; Iadecola, A.; Kajitani, J.; Miura, O.; Mizokawa, T.; Saini, N. L.

Physical Chemistry Chemical Physics17(34)p.22090 - 220962015年07月-2015年07月 

DOIScopus

詳細

ISSN:14639076

概要:© the Owner Societies 2015. We have studied the effect of RE substitution on the structure and the local atomic disorder in REO0.5F0.5BiS2 (RE = rare-earth) to understand their correlation with the bulk superconductivity in these materials. The mean RE size, affecting the chemical pressure, has been varied in two series namely Ce1-xNdxO0.5F0.5BiS2 and Nd1-ySmyO0.5F0.5BiS2. The lattice parameters evolve anomalously, showing an anisotropic shrinkage (elongation) of the c-axis (a-axis) to an isotropic expansion of the lattice with increasing mean RE size. The Bi L3-edge extended X-ray absorption fine structure (EXAFS) measurements are performed to investigate local displacements in the BiS2 lattice, revealing a large disorder and a sharp boundary between the Ce-containing and Sm-containing series with a distinct local structure. The results suggest that the bulk superconductivity in REO0.5F0.5BiS2 is correlated with anomalous atomic displacements in the Bi-S1 network, likely to be a combined effect of active Bi 6s electronic states and a possible Jahn-Teller-like instability of the Bi 6px/6py electrons.

外部研究資金

科学研究費採択状況

研究種別:

遷移金属化合物表面における特異なスピン・電荷・軌道状態の分光研究

2013年-0月-2016年-0月

配分額:¥4290000

研究種別:

スペクトル分解のベイズ理論とその展開

2012年-0月-2014年-0月

配分額:¥3510000

研究種別:

強相関物質表面での光誘起相転移の光電子分光

配分額:¥18980000

研究種別:

紫外線・真空紫外線を用いた光電子・逆光電子分光法による強相関物質の電子状態

配分額:¥28600000

研究種別:

単結晶薄膜化により物性を制御した強相関系遷移金属酸化物の電子構造の研究

配分額:¥49270000

研究種別:

光電子分光法による磁性半導体の物性研究

配分額:¥19500000

研究種別:

X線吸収分光・光電子分光による遷移金属酸化物の軌道状態の研究

配分額:¥1000000

研究種別:

光電子分光を利用した分子ビーム制御による遷移金属酸化物薄膜成長法の開発

配分額:¥2400000

研究種別:

高エネルギー分解能逆光電子分光装置の開発

配分額:¥15500000

研究種別:

非制限ハートリーフォック計算による3d遷移金属酸化物でのスピン、電荷、軌道整列

配分額:¥1700000

研究種別:

高分解能光電子分光によるフェルミ面近傍の低次元電子状態の研究

配分額:¥2000000

研究種別:

高分解能光電子分光によるフェルミ面近傍の低次元電子状態の研究

配分額:¥3300000

研究種別:

エキシトニック絶縁体における電子正孔相関の光制御

2019年-0月-2023年-0月

配分額:¥45240000

研究種別:

共鳴非弾性軟X線散乱による銅酸化物高温超伝導体の電荷ゆらぎ超伝導機構の研究

2019年-0月-2022年-0月

配分額:¥4290000

研究種別:

強相関電子系における軌道/電荷揺らぎと新奇物性

2019年-0月-2022年-0月

配分額:¥17290000

学内研究制度

特定課題研究

電荷・軌道不安定を持つ遷移金属カルコゲナイドの電子構造

2015年度

研究成果概要:層状構造を持つ磁性体である鉄カルコゲナイドFeTe、ビスマスカルコゲナイドCe(O,F)BiS2超伝導体、励起子絶縁体の候補物質として注目されているTa2Ni(Se.S)5、最高性能を持つ熱電材料として注目されているSnSeについ...層状構造を持つ磁性体である鉄カルコゲナイドFeTe、ビスマスカルコゲナイドCe(O,F)BiS2超伝導体、励起子絶縁体の候補物質として注目されているTa2Ni(Se.S)5、最高性能を持つ熱電材料として注目されているSnSeについて、超高真空中で単結晶を剥離した表面を角度分解光電子分光によって計測した。それぞれの物質についてバンド分散やフェルミ面を精密に計測し、電子物性の起源の解明のために重要な役割を果たす知見が得られた。FeTeについては、反強磁性相で電子状態が不均一となり実空間で特徴的な縞状構造が出現することを発見した。

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固体物理学A先進理工学部2020春学期
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固体物理学A  【前年度成績S評価者用】先進理工学部2019春学期
固体物理学A  【前年度成績S評価者用】先進理工学部2019春学期
固体物理学A  【前年度成績S評価者用】先進理工学部2020春学期
固体物理学A  【前年度成績S評価者用】先進理工学部2020春学期
卒業研究先進理工学部2019通年
卒業研究先進理工学部2020通年
卒業研究  【前年度成績S評価者用】先進理工学部2019通年
卒業研究  【前年度成績S評価者用】先進理工学部2020通年
応用物理学実験A先進理工学部2019通年
応用物理学実験A先進理工学部2020通年
応用物理学実験A  【前年度成績S評価者用】先進理工学部2019通年
応用物理学実験A  【前年度成績S評価者用】先進理工学部2020通年
Graduation Thesis A (Physics)先進理工学部2019秋学期
Graduation Thesis A (Physics)先進理工学部2020秋学期
Graduation Thesis A (Physics) [S Grade]先進理工学部2019秋学期
Graduation Thesis A (Physics) [S Grade]先進理工学部2020秋学期
Graduation Thesis A (Applied Physics)先進理工学部2019秋学期
Graduation Thesis A (Applied Physics)先進理工学部2020秋学期
Graduation Thesis A (Applied Physics) [S Grade]先進理工学部2019秋学期
Graduation Thesis A (Applied Physics) [S Grade]先進理工学部2020秋学期
Graduation Thesis B (Physics)先進理工学部2019春学期
Graduation Thesis B (Physics)先進理工学部2020春学期
Graduation Thesis B (Physics) [S Grade]先進理工学部2019春学期
Graduation Thesis B (Physics) [S Grade]先進理工学部2020春学期
Graduation Thesis B (Applied Physics)先進理工学部2019春学期
Graduation Thesis B (Applied Physics)先進理工学部2020春学期
Graduation Thesis B (Applied Physics) [S Grade]先進理工学部2019春学期
Graduation Thesis B (Applied Physics) [S Grade]先進理工学部2020春学期
Laboratory for Advanced Science and Engineering A先進理工学部2019春クォーター
Laboratory for Advanced Science and Engineering A先進理工学部2019春クォーター
Laboratory for Advanced Science and Engineering A先進理工学部2019春クォーター
Laboratory for Advanced Science and Engineering A先進理工学部2020春クォーター
Laboratory for Advanced Science and Engineering A先進理工学部2020春クォーター
Laboratory for Advanced Science and Engineering A先進理工学部2020春クォーター
Laboratory for Advanced Science and Engineering A [S Grade]先進理工学部2020春クォーター
Laboratory for Advanced Science and Engineering A [S Grade]先進理工学部2020春クォーター
Laboratory for Advanced Science and Engineering A [S Grade]先進理工学部2020春クォーター
Laboratory for Advanced Science and Engineering B先進理工学部2019夏クォーター
Laboratory for Advanced Science and Engineering B先進理工学部2019夏クォーター
Laboratory for Advanced Science and Engineering B先進理工学部2019夏クォーター
Laboratory for Advanced Science and Engineering B先進理工学部2020夏クォーター
Laboratory for Advanced Science and Engineering B先進理工学部2020夏クォーター
Laboratory for Advanced Science and Engineering B先進理工学部2020夏クォーター
Laboratory for Advanced Science and Engineering B [S Grade]先進理工学部2020夏クォーター
Laboratory for Advanced Science and Engineering B [S Grade]先進理工学部2020夏クォーター
Laboratory for Advanced Science and Engineering B [S Grade]先進理工学部2020夏クォーター
Current Topics in Physics先進理工学部2019秋学期
Current Topics in Physics先進理工学部2019秋学期
Current Topics in Physics先進理工学部2019秋学期
Current Topics in Physics先進理工学部2020秋学期
Current Topics in Physics先進理工学部2020秋学期
Current Topics in Physics先進理工学部2020秋学期
Current Topics in Physics [S Grade]先進理工学部2019秋学期
Current Topics in Physics [S Grade]先進理工学部2020秋学期
Problem Solving in Fundamental Physics A先進理工学部2019春クォーター
Exercises for Fundamental Physics A先進理工学部2019春クォーター
Problem Solving in Fundamental Physics A先進理工学部2020春クォーター
Exercises for Fundamental Physics A先進理工学部2020春クォーター
修士論文(物理応物)大学院先進理工学研究科2019通年
修士論文(物理応物)大学院先進理工学研究科2020通年
Research on Electronic Correlation Physics大学院先進理工学研究科2019通年
電子相関物理研究大学院先進理工学研究科2019通年
Research on Electronic Correlation Physics大学院先進理工学研究科2020通年
電子相関物理研究大学院先進理工学研究科2020通年
Strongly Correlated Electron Physics大学院先進理工学研究科2019秋学期
強相関電子特論大学院先進理工学研究科2019秋学期
Seminar on Electronic Correlation Physics A大学院先進理工学研究科2019春学期
電子相関物理演習A大学院先進理工学研究科2019春学期
Seminar on Electronic Correlation Physics B大学院先進理工学研究科2019秋学期
電子相関物理演習B大学院先進理工学研究科2019秋学期
Seminar on Electronic Correlation Physics C大学院先進理工学研究科2020春学期
電子相関物理演習C大学院先進理工学研究科2020春学期
Seminar on Electronic Correlation Physics D大学院先進理工学研究科2020秋学期
電子相関物理演習D大学院先進理工学研究科2020秋学期
Master's Thesis (Department of Pure and Applied Physics)大学院先進理工学研究科2019通年
Master's Thesis (Department of Pure and Applied Physics)大学院先進理工学研究科2020通年
電子相関物理研究大学院先進理工学研究科2019通年
電子相関物理研究大学院先進理工学研究科2020通年
物理学及応用物理学海外特別演習A大学院先進理工学研究科2019通年
物理学及応用物理学海外特別演習A大学院先進理工学研究科2020通年
物理学及応用物理学海外特別演習B大学院先進理工学研究科2019通年
物理学及応用物理学海外特別演習B大学院先進理工学研究科2020通年
物理学及応用物理学海外特別演習C大学院先進理工学研究科2019通年
物理学及応用物理学海外特別演習C大学院先進理工学研究科2020通年
物理学及応用物理学海外特別演習D大学院先進理工学研究科2019通年
物理学及応用物理学海外特別演習D大学院先進理工学研究科2020通年