1993 年度実績報告書

高温超伝導の科学-電子物性・超伝導機構

研究課題

研究課題/領域番号	04240107
研究機関	名古屋大学
研究代表者	佐藤正俊名古屋大学, 理学部, 教授 (40092225)
研究分担者	安岡弘志東京大学, 物性研究所, 教授 (50026027) 遠藤康夫東北大学, 理学部, 教授 (00013483) 内田慎一東京大学, 工学部, 教授 (10114399) 藤田敏三広島大学, 理学部, 教授 (20004369) 朝山邦輔大阪大学, 基礎工学部, 教授 (20029416)
キーワード	酸化物高温超伝導 / 異常金属相 / 新型モット転移 / スピンギャップ / NMR横緩和率 / 高分解能光電子分光 / 面問電荷ダイナミックス / 中性子散乱
研究概要	高温超伝導体の異常物性を理解するため,その電子系に対する新しい物理概念の構築と,それに連動した超伝導機構解明とを目的として,詳細な実験研究をその常伝導・超伝導双方の状態について進めた。その結果まず銅酸化物が反強磁性モット絶縁体近傍に位置する“異常金属相"として鮮明に認識された。またこれが従来のモット転移と異なる新型金属・絶縁体転移を有するものであることが,低温電子比熱や高温輸送特性の測定結果から実証された。この“異常金属相"と“スピンギャップ"との関連が具体性をもって論じられるようになった事も重要である。“スピンギャップ"はNMRや中性子散乱によりその存在が指摘され注目されていたものであるが,NMR横緩和率1/T_<2G>の測定や,CuO_2面の面間の電荷ダイナミックスの実験的解明により,よりはっきりと姿を現わしてきた。またモット絶縁体相近傍にある銅酸化物以外の強相関電子系の物性との比較検討もなされはじめ,高温超伝導の舞台である“異常金属相"に対する理解の網が実験サイドからも急速にせばめられた。超伝導状態の研究はNMR,中性子散乱,STM/STS,超音波測定,高分解能光電子分光等によって進められ,ギャップの異方性の存在を示すデータが多く得られている。これらはα波のオーダーパラメーターを示すようであるが,NMR1/T_<2G>の測定からは低温でS波にうつりかわるという指摘もなされ,今後の研究のポイントとなっている。高温超伝導に対する不純物効果の実験も精力的になされ,対称性に関する有用な情報が得られた。また多くの実験結果の解釈にランダムネスの効果の考慮が重要であることが示された。他にいわゆる1/8問題の謎がほぼ解明されたこと,Hg系のTcへの圧力効果測定によって,常圧での超伝導転移温度がさらに上昇する可能性が示されたこと等も注目される。

研究成果
(71件)

すべてその他

すべて文献書誌 (71件)

[文献書誌] J.Takeda: "Anomalous Behaviors of Hall Coefficients and Thermoelectric Powers of YBa_2Cu_3O_<6+X> and La_<2-x>Sr_xCuO_4 above Room Temperature" J.Phys.Soc.Jpn. 62. 2571-2574 (1993)
[文献書誌] H.Harashina: "Neutron Scattering studies of In-Plane Zone Boundary Phonons of YBa_2Cu_3O_<6.6> (Tc=53K) and YBa_2Cu_3O_<6.9> (Tc=90K)" J.Phys.Soc.Jpn.63(to be published). (1994)
[文献書誌] S.Shamoto: "Neutron Scattering Study of Antiferromagnetism in YBa_2Cu_3O_<6.15>" Phys.Rev.B(to be published). (1994)
[文献書誌] M.Sato: "Transport Anomalies above Room Temperature and Metal-Insulator Transition of High-Tc Oxides" Proc.Int.Symp.on Superconductivity. (to be published).
[文献書誌] T.Nishikawa: "Transport Anomalies of High-Tc Oxides above Room Temperature" J.Phys.Soc.Jpn.63(to be published). (1994)
[文献書誌] S.Shamoto: "Thermodynamic Properties of Superconductiviting YBa_2(Cu┣D21-Mx)┣D23┫D2O┣D26+y┫D2(M=Zn and Ni) Studied by Reversible Magnetization Measurements" J.Phys.Soc.Jpn.63(to be published). (1994)
[文献書誌] S.Tanaka: "STM/STS Studies on YBa_2Cu_3Oy Single Crystals" Physica C. (to be published).
[文献書誌] G.-q.Zheng: "^<17>O NMR Study of La_<2-X>Sr_xCuO_4 in the Lightly- and Heavily-Doped Regions" Physica.C. 208. 339-346 (1993)
[文献書誌] K.Kakurai: "Neutron Scattering Study of Magnetic Fluctuation in Zn-substituted YBa_2Cu_3O_<6.6>" Phys.Rev.B48. 3485-3490 (1993)
[文献書誌] H.Fujishita: "Crystal Structure Determination of Pb_2Sr_2YCu_3O_<8+δ> (δ=0,1.67) by Powder Neutron Diffraction" Physica. C210. 529-535 (1993)
[文献書誌] B.J.Sternlieb: "Temperature Dependence of the Dynamical Susceptibility X^<11>(ω) in Superconducting YBa_2Cu_3O_<6.6> (Tc=53K)" Phys.Rev.B47. 5320-5324 (1993)
[文献書誌] H.Harashina: "Cu-Site Doping Effects,Transport and Magnetic Properties of High-Tc Oxides and Their Hole Concentration Dependence" Physica. C212. 142-150 (1993)
[文献書誌] T.Nishikawa: "Study on Sulphur Doping to the La_<2-X>MxCuO_4 (M=Ba and Sr)" Physica. C211. 127-131 (1993)
[文献書誌] H.Harashina: "Temperature Dependence of the magnetic Excitation Spectra of YBa_2Cu_<2.9>Zn_<0.1>O_<6.75>" J.Phys.Soc.Jpn.62. 4009-4015 (1993)
[文献書誌] T.Nishikawa: "Anomalous Temperature Dependence of the Hall Coefficient in La_<2-x>Sr_xCuO_4 above Room Temperature" J.Phys.Soc.Jpn.62. 2568-2570 (1993)
[文献書誌] S.Tanaka: "STM,STS Studies of Molybdenum Oxide Conductors" Solid State Commun.87. 877-882 (1993)
[文献書誌] K.Ishida: "Cu NMR and NQR Studies of Impurities-Doped YBa_2(Cu_<1-x>Mn_x)_3O_7(M=Zn and Ni)" J.Phys.Soc.Jpn.62. 2803-2818 (1993)
[文献書誌] Guo-qing Zheng: "^<63>Cu NQR/NMR Study of Zn-Substituted YBa_2Cu_4O_8--Effect of Impurity on Spin Gap Behavior--" J.Phys.Soc.Jpn.62. 2591-2594 (1993)
[文献書誌] S.Ohsugi: "Antiferromagnetic spin correlation and superconductivity in the overdoped superconductor La_<2-x>Sr_xCuO_4" Physica B. 186-187. 1027-1029 (1993)
[文献書誌] K.Asayama: "NMR in highly correlated superconductors" Hyperfine Interactions. 79. 835-849 (1993)
[文献書誌] S.Ohsugi: "Cu NMR and NQR Studies of High-Tc Superconductor La_<2-x>Sr_xCuO_4" J.Phys.Soc.Jpn.63. 700-715 (1994)
[文献書誌] P.Lemmens: "Pinning in High-Field Superconductors:A Comparison Using Magnetoacoustic Experiments" Proceedings of the 5th Intrnational Symposium on Superconductivity-ISS'92. 471-474 (1993)
[文献書誌] M.Nohara: "Interplay between Lattice Softening and High-Tc Superconductivity in La_<1.86>Sr_<0.14>CuO_4" Phys.Rev.Lett.70. 3447-3450 (1993)
[文献書誌] M.Udagawa: "Phonon Raman Scattering of (La_<1-x>Sr_x)_2NiO_4" Phys.Rev.B 47. 17. 11391-11397 (1993)
[文献書誌] A.Odagawa: "Resistive Transition under High Magnetic Fields in Bi2Sr2CaCu220y Multilaver Thin Films" Phys.Rev.B 48. 17. 12985-12988 (1993)
[文献書誌] T.Suzuki: "Lattice Instability in the Normal State of La_<2-x>Sr_xCuO_4" J.Superconductivity 7. 1. 419-421 (1994)
[文献書誌] Y.Maeno: "Structural Instabilities and Superconductivity in La-214 Compounds" J.Superconductivity. 7(to be published). (1994)
[文献書誌] F.Nakamura: "Stability of the Low-Temperature Tetragonal Phase in La_<2-x>Ba_xCuO_4 and Related Compounds" J.Superconductivity. 7. (1994)
[文献書誌] Y.Maeno: "Thermal Expansion of La_<2-x>Sr_xCuO_4 Single Crystals" Advances in Superconductivity VI. (1994)
[文献書誌] X.Z.Bao: "Superconductivity and Structural Phase Transition in La_<2-x>Ba_xCuO_4 with La Partially Replaced by Th" Advances in Superconductivity VI. (1994)
[文献書誌] M.Nohara: "Effects of Superconductivity on Elastic Constants of La_<1-x>Sr_xCuO_4" to appear in proc.of LT20.
[文献書誌] K.Yoshida: "Effects of Ionic State Size on the x=1/8 Anomaly in La_<2-x>Ba_<x-y>M_yCuO_4(M=Ca,Sr)" to appear in proc.of LT20.
[文献書誌] Y.Tanaka: "Structural Transition in La_<2-y-x>Nd_yBa_xCuO_4 with x=0.125" to appear in proc.of LT20.
[文献書誌] P.Lemmens: "Specific Heat Measurements across the Metal-Insulator Transition in Bi_2Sr_2(Ca_zRE_<1-z>)Cu_2O_8 with RE-Y,Pr,Nd and Gd" to appear in proc.of LT20.
[文献書誌] P.Lemmens: "The Dependence of the Magnetoacoustic Properties of La_<2-x>Sr_xCuO_4 on Doping" to appear in proc.of LT20.
[文献書誌] R.J.Cava: "Superconductivity in the quarternary intermetallic compounds LnNi_2B_2C" Nature(London). 367. 252-253 (1994)
[文献書誌] R.J.Cava: "Superconductivity at 23K in ytlrium palladium boride carbide" Nature(London). 367. 146-148 (1994)
[文献書誌] T.Katsufuji: "Symmetry-dependent electronic Ramanscattering in La_<2-x>Sr_xCuO_4" Phys.Rev.B. 48. 131-134 (1993)
[文献書誌] A.Keren: "MSR measurements in infinite-layer and infinite-chain cuprates" Phys.Rev.B. 48. 926-935 (1993)
[文献書誌] J.D.Sullivan: "Electron-density Fourier maps of an untwinned YBa_2Cu_3O_<6.877>" Phys.Rev.B. 48. 10638-10641 (1993)
[文献書誌] S.Uchida: "Recent progress in High-Tc Superconductor research" Jpn.J.Appl.Phys.32. 3784-3798 (1993)
[文献書誌] H.Sato: "Superconducting and normal states of Ba_<1-x>K_xBiO_3" Phys.Rev.B. 48. 6617-6625 (1993)
[文献書誌] T.Arima: "Optical spectra of Pr_<2-x>Ce_xCuO_<4-δ> crystals" Phys.Rev.B. 48. 6597-6603 (1993)
[文献書誌] M.Abbate: "Electronic structure and spin-state transition of LaCoO_3" Phys.Rev.B. 47. 124-130 (1993)
[文献書誌] S.Tajima: "Optical study of(L_1,Ce)_2(Ba,L_2)_2Cu_3O_<8+x>" Phys.Rev.B. 47. 126-133 (1993)
[文献書誌] T.Ito: "Systematic deviation from T-linear behavior in the resisthivity of YBa_2Cu_3O_<1-y>" Phys.Rev.Lett.70. 3995-3998 (1993)
[文献書誌] I.Hase: "Electronic structure and metal-insulator transitions in Ti and V oxides" Physica B. 186-188. 1074-1076 (1993)
[文献書誌] A.Fujimori: "Evolution of the spectral function in Mott-Hubbard systems" Physica B. 186-188. 981-985 (1993)
[文献書誌] S.Uchida: "Electron correlation and optical conductivity in high Tc cuprates" Physica B. 186-188. 975-980 (1993)
[文献書誌] M.Kasuya: "Optical spectra of Y_<1-x>Ca_xVO_3" Phys.Rev.B. 47. 6197-6202 (1993)
[文献書誌] Y.Nakamura: "Anisotropic transport properties of La_<2-x>Sr_xCuO_4" Phys.Rev.B. 47. 8369-8372 (1993)
[文献書誌] E.Pellegrin: "Orbital character of states at the Fermi level in La_<2-x>Sr_xCuO_4" Phys.Rev.B. 47. 3354-3367 (1993)
[文献書誌] K.Tatsuhara: "Magnetoresistance and upper critical fields of Ba_<1-x>K_xBiO_3" Physica C. 212. 459-464 (1993)
[文献書誌] M.Matsuda: "Dynamic Spin Properties of La1.98Sr0.02CuO4" J.Phys.Soc.Jpn. 62-5. 1702-1709 (1993)
[文献書誌] K.Nakajima: "Spin-wave excitations in two dimensional antiferromagnet of stoichiometric La_2NiO_4" J.Phys.Soc.Jpn. 62. 4438-4448 (1993)
[文献書誌] K.Yamada: "Incommensurate Magnetic Correlations in La2NiO4.125:Magnetic Phase Diagram and Two-dimensional Hole-Order" Physica C. (in press). (1994)
[文献書誌] T.Shimizu: "Orbital and Spin Susceptibility of the Plane Coppersites in YBa_2Cu_3O_x System" J.Phys.Soc.Jpn.62. 3710-3720 (1993)
[文献書誌] S.Kambe: "Evidence for Transferred Spin Polarization at the apical O Sites in Tl_2Ba_2CuO_7" Phys.Rev.B48. 6593-6596 (1993)
[文献書誌] T.Takahashi: "Bulk and Surface Electronic Structure of High-Tc Superconductors" Proc.1993 Int.Conf.Superconductivity. 37-40 (1993)
[文献書誌] T.Yokoya and T.Takahashi: "Superconducting Gap in Bi2Sr2CaCu208 Observed by High-Energy-Resolution Photoemission Spectroscopy" Solid State Communications. 87. 553-556 (1993)
[文献書誌] S.Adachi: "High-pressure synthesis of superconducting Sr-Ca-Cu-O samples" Physica C. 208. 226-230 (1993)
[文献書誌] S.Adachi: "New superconducting cuprates in the Sr-Ca-Cu-O system" Physica C. 212. 164-168 (1993)
[文献書誌] S.Katano: "Crystal Structure of La_<2-x>Ba_xCuO_4:Effects of Ba Substitution and Pressure" JAERI-M. 93-131. 1-45 (1993)
[文献書誌] H.Takahashi: "High pressure study on the superconducting transition temperature and Hall coefficient of Ba_<1-x>K_xBiO_3 up to 8 GPa" Physica C. 210. 485-488 (1993)
[文献書誌] S.Katano: "Crystal structure and superconductivity of La_<2-x>Ba_xCuO_4(0.03(〕 SY.ltoreq. 〔)x(〕 SY.ltoreq. 〔)0.24)" Physica C. 214. 64-72 (1993)
[文献書誌] H.Takahashi: "Effects of the pressure-temperature history on Tc and the Hall coefficient in superconducting Tl_2Ba_2CuO_<6-x>" Physica C. 217. 163-169 (1993)
[文献書誌] H.Takahashi: "Large enhancement of Tc in 134K superconductor HgBa_2Ca_2Cu_3O_y under high pressure" Physica C. 218. 1-4 (1993)
[文献書誌] S.Katano: "Pressure induced successive magnetic phase transitions in Pr_2CuO_<4+y>" Physica C. 215. 92-96 (1993)
[文献書誌] S.Katano: "Pressure effects on the structural phase transitions and superconductivity of La_<2-x>Ba_xCuO_4(x=0.125)" Phys.Rev.B. 45. 6569-6574 (1993)
[文献書誌] S.Adachi: "Syntesis of superconducting CaCuO using High Presure Techniques" Advances in Superconductivity V,eds.Y.Bando H.Yamauchi. 215-218 (1993)
[文献書誌] N.Watanebe: "Annealing Effect on Bi_2Si_2CaCu_2O_x Large Crystal Grown by Floating Zone Method" Advances in Superconductivity V,eds.Y.Bando H.Yamauchi. 403-406 (1993)

1993 年度 実績報告書

高温超伝導の科学-電子物性・超伝導機構

研究代表者

佐藤 正俊 名古屋大学, 理学部, 教授 (40092225)

研究成果

[文献書誌] J.Takeda: "Anomalous Behaviors of Hall Coefficients and Thermoelectric Powers of YBa_2Cu_3O_<6+X> and La_<2-x>Sr_xCuO_4 above Room Temperature" J.Phys.Soc.Jpn. 62. 2571-2574 (1993)

[文献書誌] H.Harashina: "Neutron Scattering studies of In-Plane Zone Boundary Phonons of YBa_2Cu_3O_<6.6> (Tc=53K) and YBa_2Cu_3O_<6.9> (Tc=90K)" J.Phys.Soc.Jpn.63(to be published). (1994)

[文献書誌] S.Shamoto: "Neutron Scattering Study of Antiferromagnetism in YBa_2Cu_3O_<6.15>" Phys.Rev.B(to be published). (1994)

[文献書誌] M.Sato: "Transport Anomalies above Room Temperature and Metal-Insulator Transition of High-Tc Oxides" Proc.Int.Symp.on Superconductivity. (to be published).

[文献書誌] T.Nishikawa: "Transport Anomalies of High-Tc Oxides above Room Temperature" J.Phys.Soc.Jpn.63(to be published). (1994)

[文献書誌] S.Shamoto: "Thermodynamic Properties of Superconductiviting YBa_2(Cu┣D21-Mx)┣D23┫D2O┣D26+y┫D2(M=Zn and Ni) Studied by Reversible Magnetization Measurements" J.Phys.Soc.Jpn.63(to be published). (1994)

[文献書誌] S.Tanaka: "STM/STS Studies on YBa_2Cu_3Oy Single Crystals" Physica C. (to be published).

[文献書誌] G.-q.Zheng: "^<17>O NMR Study of La_<2-X>Sr_xCuO_4 in the Lightly- and Heavily-Doped Regions" Physica.C. 208. 339-346 (1993)

[文献書誌] K.Kakurai: "Neutron Scattering Study of Magnetic Fluctuation in Zn-substituted YBa_2Cu_3O_<6.6>" Phys.Rev.B48. 3485-3490 (1993)

[文献書誌] H.Fujishita: "Crystal Structure Determination of Pb_2Sr_2YCu_3O_<8+δ> (δ=0,1.67) by Powder Neutron Diffraction" Physica. C210. 529-535 (1993)

[文献書誌] B.J.Sternlieb: "Temperature Dependence of the Dynamical Susceptibility X^<11>(ω) in Superconducting YBa_2Cu_3O_<6.6> (Tc=53K)" Phys.Rev.B47. 5320-5324 (1993)

[文献書誌] H.Harashina: "Cu-Site Doping Effects,Transport and Magnetic Properties of High-Tc Oxides and Their Hole Concentration Dependence" Physica. C212. 142-150 (1993)

[文献書誌] T.Nishikawa: "Study on Sulphur Doping to the La_<2-X>MxCuO_4 (M=Ba and Sr)" Physica. C211. 127-131 (1993)

[文献書誌] H.Harashina: "Temperature Dependence of the magnetic Excitation Spectra of YBa_2Cu_<2.9>Zn_<0.1>O_<6.75>" J.Phys.Soc.Jpn.62. 4009-4015 (1993)

[文献書誌] T.Nishikawa: "Anomalous Temperature Dependence of the Hall Coefficient in La_<2-x>Sr_xCuO_4 above Room Temperature" J.Phys.Soc.Jpn.62. 2568-2570 (1993)

[文献書誌] S.Tanaka: "STM,STS Studies of Molybdenum Oxide Conductors" Solid State Commun.87. 877-882 (1993)

[文献書誌] K.Ishida: "Cu NMR and NQR Studies of Impurities-Doped YBa_2(Cu_<1-x>Mn_x)_3O_7(M=Zn and Ni)" J.Phys.Soc.Jpn.62. 2803-2818 (1993)

[文献書誌] Guo-qing Zheng: "^<63>Cu NQR/NMR Study of Zn-Substituted YBa_2Cu_4O_8--Effect of Impurity on Spin Gap Behavior--" J.Phys.Soc.Jpn.62. 2591-2594 (1993)

[文献書誌] S.Ohsugi: "Antiferromagnetic spin correlation and superconductivity in the overdoped superconductor La_<2-x>Sr_xCuO_4" Physica B. 186-187. 1027-1029 (1993)

[文献書誌] K.Asayama: "NMR in highly correlated superconductors" Hyperfine Interactions. 79. 835-849 (1993)

[文献書誌] S.Ohsugi: "Cu NMR and NQR Studies of High-Tc Superconductor La_<2-x>Sr_xCuO_4" J.Phys.Soc.Jpn.63. 700-715 (1994)

[文献書誌] P.Lemmens: "Pinning in High-Field Superconductors:A Comparison Using Magnetoacoustic Experiments" Proceedings of the 5th Intrnational Symposium on Superconductivity-ISS'92. 471-474 (1993)

[文献書誌] M.Nohara: "Interplay between Lattice Softening and High-Tc Superconductivity in La_<1.86>Sr_<0.14>CuO_4" Phys.Rev.Lett.70. 3447-3450 (1993)

[文献書誌] M.Udagawa: "Phonon Raman Scattering of (La_<1-x>Sr_x)_2NiO_4" Phys.Rev.B 47. 17. 11391-11397 (1993)

[文献書誌] A.Odagawa: "Resistive Transition under High Magnetic Fields in Bi2Sr2CaCu220y Multilaver Thin Films" Phys.Rev.B 48. 17. 12985-12988 (1993)

[文献書誌] T.Suzuki: "Lattice Instability in the Normal State of La_<2-x>Sr_xCuO_4" J.Superconductivity 7. 1. 419-421 (1994)

[文献書誌] Y.Maeno: "Structural Instabilities and Superconductivity in La-214 Compounds" J.Superconductivity. 7(to be published). (1994)

[文献書誌] F.Nakamura: "Stability of the Low-Temperature Tetragonal Phase in La_<2-x>Ba_xCuO_4 and Related Compounds" J.Superconductivity. 7. (1994)

[文献書誌] Y.Maeno: "Thermal Expansion of La_<2-x>Sr_xCuO_4 Single Crystals" Advances in Superconductivity VI. (1994)

[文献書誌] X.Z.Bao: "Superconductivity and Structural Phase Transition in La_<2-x>Ba_xCuO_4 with La Partially Replaced by Th" Advances in Superconductivity VI. (1994)

[文献書誌] M.Nohara: "Effects of Superconductivity on Elastic Constants of La_<1-x>Sr_xCuO_4" to appear in proc.of LT20.

[文献書誌] K.Yoshida: "Effects of Ionic State Size on the x=1/8 Anomaly in La_<2-x>Ba_<x-y>M_yCuO_4(M=Ca,Sr)" to appear in proc.of LT20.

[文献書誌] Y.Tanaka: "Structural Transition in La_<2-y-x>Nd_yBa_xCuO_4 with x=0.125" to appear in proc.of LT20.

[文献書誌] P.Lemmens: "Specific Heat Measurements across the Metal-Insulator Transition in Bi_2Sr_2(Ca_zRE_<1-z>)Cu_2O_8 with RE-Y,Pr,Nd and Gd" to appear in proc.of LT20.

[文献書誌] P.Lemmens: "The Dependence of the Magnetoacoustic Properties of La_<2-x>Sr_xCuO_4 on Doping" to appear in proc.of LT20.

[文献書誌] R.J.Cava: "Superconductivity in the quarternary intermetallic compounds LnNi_2B_2C" Nature(London). 367. 252-253 (1994)

[文献書誌] R.J.Cava: "Superconductivity at 23K in ytlrium palladium boride carbide" Nature(London). 367. 146-148 (1994)

[文献書誌] T.Katsufuji: "Symmetry-dependent electronic Ramanscattering in La_<2-x>Sr_xCuO_4" Phys.Rev.B. 48. 131-134 (1993)

[文献書誌] A.Keren: "MSR measurements in infinite-layer and infinite-chain cuprates" Phys.Rev.B. 48. 926-935 (1993)

[文献書誌] J.D.Sullivan: "Electron-density Fourier maps of an untwinned YBa_2Cu_3O_<6.877>" Phys.Rev.B. 48. 10638-10641 (1993)

[文献書誌] S.Uchida: "Recent progress in High-Tc Superconductor research" Jpn.J.Appl.Phys.32. 3784-3798 (1993)

[文献書誌] H.Sato: "Superconducting and normal states of Ba_<1-x>K_xBiO_3" Phys.Rev.B. 48. 6617-6625 (1993)

[文献書誌] T.Arima: "Optical spectra of Pr_<2-x>Ce_xCuO_<4-δ> crystals" Phys.Rev.B. 48. 6597-6603 (1993)

[文献書誌] M.Abbate: "Electronic structure and spin-state transition of LaCoO_3" Phys.Rev.B. 47. 124-130 (1993)

[文献書誌] S.Tajima: "Optical study of(L_1,Ce)_2(Ba,L_2)_2Cu_3O_<8+x>" Phys.Rev.B. 47. 126-133 (1993)

[文献書誌] T.Ito: "Systematic deviation from T-linear behavior in the resisthivity of YBa_2Cu_3O_<1-y>" Phys.Rev.Lett.70. 3995-3998 (1993)

[文献書誌] I.Hase: "Electronic structure and metal-insulator transitions in Ti and V oxides" Physica B. 186-188. 1074-1076 (1993)

[文献書誌] A.Fujimori: "Evolution of the spectral function in Mott-Hubbard systems" Physica B. 186-188. 981-985 (1993)

[文献書誌] S.Uchida: "Electron correlation and optical conductivity in high Tc cuprates" Physica B. 186-188. 975-980 (1993)

[文献書誌] M.Kasuya: "Optical spectra of Y_<1-x>Ca_xVO_3" Phys.Rev.B. 47. 6197-6202 (1993)

[文献書誌] Y.Nakamura: "Anisotropic transport properties of La_<2-x>Sr_xCuO_4" Phys.Rev.B. 47. 8369-8372 (1993)

[文献書誌] E.Pellegrin: "Orbital character of states at the Fermi level in La_<2-x>Sr_xCuO_4" Phys.Rev.B. 47. 3354-3367 (1993)

[文献書誌] K.Tatsuhara: "Magnetoresistance and upper critical fields of Ba_<1-x>K_xBiO_3" Physica C. 212. 459-464 (1993)

[文献書誌] M.Matsuda: "Dynamic Spin Properties of La1.98Sr0.02CuO4" J.Phys.Soc.Jpn. 62-5. 1702-1709 (1993)

[文献書誌] K.Nakajima: "Spin-wave excitations in two dimensional antiferromagnet of stoichiometric La_2NiO_4" J.Phys.Soc.Jpn. 62. 4438-4448 (1993)

[文献書誌] K.Yamada: "Incommensurate Magnetic Correlations in La2NiO4.125:Magnetic Phase Diagram and Two-dimensional Hole-Order" Physica C. (in press). (1994)

[文献書誌] T.Shimizu: "Orbital and Spin Susceptibility of the Plane Coppersites in YBa_2Cu_3O_x System" J.Phys.Soc.Jpn.62. 3710-3720 (1993)

[文献書誌] S.Kambe: "Evidence for Transferred Spin Polarization at the apical O Sites in Tl_2Ba_2CuO_7" Phys.Rev.B48. 6593-6596 (1993)

[文献書誌] T.Takahashi: "Bulk and Surface Electronic Structure of High-Tc Superconductors" Proc.1993 Int.Conf.Superconductivity. 37-40 (1993)

[文献書誌] T.Yokoya and T.Takahashi: "Superconducting Gap in Bi2Sr2CaCu208 Observed by High-Energy-Resolution Photoemission Spectroscopy" Solid State Communications. 87. 553-556 (1993)

[文献書誌] S.Adachi: "High-pressure synthesis of superconducting Sr-Ca-Cu-O samples" Physica C. 208. 226-230 (1993)

[文献書誌] S.Adachi: "New superconducting cuprates in the Sr-Ca-Cu-O system" Physica C. 212. 164-168 (1993)

[文献書誌] S.Katano: "Crystal Structure of La_<2-x>Ba_xCuO_4:Effects of Ba Substitution and Pressure" JAERI-M. 93-131. 1-45 (1993)

[文献書誌] H.Takahashi: "High pressure study on the superconducting transition temperature and Hall coefficient of Ba_<1-x>K_xBiO_3 up to 8 GPa" Physica C. 210. 485-488 (1993)

[文献書誌] S.Katano: "Crystal structure and superconductivity of La_<2-x>Ba_xCuO_4(0.03(〕 SY.ltoreq. 〔)x(〕 SY.ltoreq. 〔)0.24)" Physica C. 214. 64-72 (1993)

[文献書誌] H.Takahashi: "Effects of the pressure-temperature history on Tc and the Hall coefficient in superconducting Tl_2Ba_2CuO_<6-x>" Physica C. 217. 163-169 (1993)

[文献書誌] H.Takahashi: "Large enhancement of Tc in 134K superconductor HgBa_2Ca_2Cu_3O_y under high pressure" Physica C. 218. 1-4 (1993)

[文献書誌] S.Katano: "Pressure induced successive magnetic phase transitions in Pr_2CuO_<4+y>" Physica C. 215. 92-96 (1993)

[文献書誌] S.Katano: "Pressure effects on the structural phase transitions and superconductivity of La_<2-x>Ba_xCuO_4(x=0.125)" Phys.Rev.B. 45. 6569-6574 (1993)

[文献書誌] S.Adachi: "Syntesis of superconducting CaCuO using High Presure Techniques" Advances in Superconductivity V,eds.Y.Bando H.Yamauchi. 215-218 (1993)

[文献書誌] N.Watanebe: "Annealing Effect on Bi_2Si_2CaCu_2O_x Large Crystal Grown by Floating Zone Method" Advances in Superconductivity V,eds.Y.Bando H.Yamauchi. 403-406 (1993)

1993 年度実績報告書

佐藤正俊名古屋大学, 理学部, 教授 (40092225)