2003 Fiscal Year Annual Research Report

多元融合領域の新物質相

Research Project

Project/Area Number	15GS0213
Research Institution	Osaka University
Principal Investigator	北岡良雄大阪大学, 基礎工学研究科, 教授 (70110707)
Co-Investigator(Kenkyū-buntansha)	菅滋正大阪大学, 基礎工学研究科, 教授 (40107438) 大貫惇睦大阪大学, 理学研究科, 教授 (40118659) 三宅和正大阪大学, 基礎工学研究科, 教授 (90109265) 鈴木直大阪大学, 基礎工学研究科, 教授 (40029559) 野末泰夫大阪大学, 理学研究科, 教授 (60125630)
Keywords	強相関電子系 / 超伝導材料・素子 / 磁性 / ナノ材料 / 物性理論 / 物性実験
Research Abstract	「多元融合領域の予測を超えた未開の新物質相」の発見と現象の解明を行うことが本学術創成研究の目的である。初年度は、以下のような多くの成果を挙げた。 1.三角格子コバルト酸化物超伝導体が異方的スピン一重項超伝導状態であることを世界に先駆けて示した.(北岡)2.反強磁性および強磁性磁気臨界点近傍で超伝導状態とのミクロな共存相を世界に先駆けて示した.(北岡)3.強磁性希土類化合物UIr(小林、大貫)、および反強磁性体CeNiGe_3(大貫)で圧力誘起超伝導を発見した.4.結晶構造に反転対称性のない新超伝導体CePt_3Siがこれまでものとは異なる重い電子系超伝導状態にあることを世界に先駆けて示した.(北岡)5.CeCu_2(Ge,Si)_2で観測される異常な超伝導相図に関連する現象を「価数転移量子臨界現象」として包括的に理解すること、及び、反強磁性と共存する「ギャップレス超伝導状態」の記述に成功した.(三宅)6.ゼオライトLTA中のKクラスターについて高磁場磁化率とμSR測定を行い、軌道縮退によって飛躍的に増大したスピンキャントが強磁性の発現機構として最も可能性が高いことを明らかにした.(野末)7.SPring-8軟X線を用いたバルク敏感光電子分光を行い、Ce化合物の近藤共鳴の裾の観測、ならびに酸化バナジウム化合物の準粒子とインコヒーレントピークの観測に成功した.(菅)8.パラジウムの高圧下超伝導相を第一原理格子振動解析により解析した。水素、フッ素付加によるナノ炭素磁性体設計法により磁化炭素ナノチューブ、高スピン分子の設計を行った(鈴木・草部).9.軽元素Liへの100GPa超級の圧力印加の為にダイヤモンドアンビル内の圧力分布と変形度を観測解析した。新冷凍機導入により超高圧極低温の実験効率を向上させた(清水).

Research Products
(40 results)

All Other

All Publications (40 results)

[Publications] Y.Fuseya: "Realization of Odd-Frequency p-Wave Spin-Singlet Superconductivity Coexisting with Antiferromagnetic Order near Quantum Critical Point"Journal of the Physical Society of Japan. VoL72,No.11. 2914-2923 (2003)
[Publications] K.Morita: "FLEX Study on Enhanced Charge Susceptibility near the Antiferromagnetic Mott Transition in Two-Dimensional t-t' Hubbard Model"Journal of the Physical Society of Japan. Vol.72,No.12. 3164-3173 (2003)
[Publications] A.T.Holmes: "Signatures of Valence Fluctuations in CeCu_2Si_2 under High Pressure"The Physical Review B. Vol.69,No.2. 024508-1-024508-11 (2004)
[Publications] T.Takeuchi, et al.: "Magnetism and Superconductivity in a Heavy-fermion Superconductor CePt_3Si"J.Phys. : Condens.Matter. (to be published).
[Publications] S.Hashimoto, et al.: "de Haas-van Alphen Effect and the Fermi Surface in CePt_3Si and LaPt_3Si"J.Phys. : Condens.Matter. (to be published).
[Publications] T.D.Matsuda, et al.: "Reduced Magnetization due to the Crystalline Electric Field for T_h site Symmetry in UFe_4P_<12>"J.Phys.Soc.Jpn.. (to be published).
[Publications] Yu Kawasaki: "Exotic superconductivity in the coexistnet phase of antiferromagnetism and superconductivity in CeCu_2(Si_<0.98>Ge_<0.02>)_2: A Du-NQR study under hydrostatic pressure"Journal of the Physical Society of Japan. 73・1. 194-197 (2004)
[Publications] Tatsuya Fujimoto: "Un conventional superconductivity and electron correlations in the Cobalt Oxyhydrate Na0.35CoO2・H2O from nuclear quadrupole resonance"Physical Review Letters. 92・4. 47004-1-47004-4 (2004)
[Publications] T.Akazawa, et al.: "Pressure-induced Superconductivity in Ferromagnetic UIr without Inversion Symmetry"J.Phys. : Condens.Matter. 16. L29-L32 (2004)
[Publications] M.Nakashima, et al.: "High-pressure Effect on the Electronic State in CeNiGe_3 : Pressure-induced Superconductivity"J.Phys. : Condens.Matter. (to be published).
[Publications] M.Yamada, et al.: "Magnetic and Fermi Surface Properties in LaRh_3B_2, CeRh_3B_2 and PrRh_3B_2"J.Phys.Soc.Jpn.. (to be published).
[Publications] Y.Okuda, et al.: "Magnetic and Fermi Surface Properties of an Antiferromagnet Ce_3Sn_7"J.Phys.Soc.Jpn.. (to be published).
[Publications] T.Nakano: "μSR Study on Ferromagnetism of Potassium Clusters in Aluminosilicate Zeolite LTA"Physica B. 326. 550-555 (2003)
[Publications] T.Nakano: "Spin Cant Model of Ferromagnetism in Potassium Clusters Incorporated in Zeolite LTA"Journal of Magnetism and Magnetic Materials. 印刷中. (2004)
[Publications] D.Kiniwa: "μSR Study of Ferromagnetism in Potassium Clusters incorporated in Zeolite LTA"Journal of Magnetism and Magnetic Materials. 印刷中. (2004)
[Publications] S.Araki: "Strong uniaxial crystal field and ising like exchange interaction of ferromagnet CeAgSb_2"Journal of Magnetism and Magnetic Materials. 印刷中. (2004)
[Publications] S.Araki: "Crystal structure, magnetic ordering, and magnetic excitation in the 4f-localized ferromagnet CeAgSb_2"Physical Review B. 68. 024408 (2003)
[Publications] M.Igarashi: "NMR Study of Rb Clusters in Zeolite LTA"Physica B. 327. 72-78 (2003)
[Publications] A.Higashiya: "Resonant Inelastic X-ray Scattering(RIXS)of SrCuO_2"Solid State Commun.. (In press). (2004)
[Publications] A.Yamasaki: "Direct observation of the single-domain limit of Fe nanomagnets by spin-polarized scanning tunneling spectroscopy"Phys.Rev.Lett.. 91. 127201-1-127201-4 (2003)
[Publications] E.-J.Cho: "Auger effect in high-resolution Ce 3d-edge resonance photoemission"Phys.Rev.. B67. 155107-1-155107-6 (2003)
[Publications] J.-S.Kang: "Resonant photoemission spectroscopy study of impurity-induced melting in Cr- and Ru-doped Nd_<1/2>A_<1/2>MnO_3(A=Ca,Sr)"Phys.Rev.. B68. 012410-1-012410-4 (2003)
[Publications] S.-K.Mo: "Prominent quasiparticle peak in the photoemission spectrum of the metallic phase of V_2O_3"Phys.Rev.Lett.. 90. 186403-1-186403-4 (2003)
[Publications] R-J.Jung: "Localized character of 4f electrons in CeRh_x(x=2,3) and CeNi_x(x=3,5)"Phys.Rev.Lett.. 91. 157601-1-157601-4 (2003)
[Publications] D.Aoki, et al.: "First Observation of the de Haas-van Alphen Effect in NpNiGa_5"J.Phys.Soc.Jpn.. (to be published).
[Publications] H.Sakai et al.: "Pressure-induced weak ferromagnetisim in Uranium Dioxide UO_2"J.Phys. : Condens.Matter. 15. S2035-S2037 (2003)
[Publications] T.Mito et al.: "Magnetic ordering in the pressure-stabilized high-temperature phase of YbInCu_4"Phys.Rev.B. 67. 224409 (2003)
[Publications] T.Muramatsu et al.: "Electrical resistivity of CeTIn_5(T=Rh,Ir)under high pressure"Physica C. 388-389. 539-540 (2003)
[Publications] N.Tateiwa et al.: "A heat capacity anomaly of the superconducting transition in a ferromagnetic superconductor UGe_2"Physica C. 388-389. 527-528 (2003)
[Publications] N.Tateiwa et al.: "A heat capacity anomaly at"T^*"in ferromagnetic superconductor UGe_2"Acta Physica Polonica B. 34. 515-518 (2003)
[Publications] K.Yanai: "Possibility of pressure-induced superconductivity by phonon mechanism in Pd"Physica C. 388-389. 569-570 (2003)
[Publications] M.Maruyama: "Magnetic properties of nanographite with modified zigzag edges"Journal of Physics and Chemistry of Solids. 65. 119-122 (2004)
[Publications] 草部浩一: "ナノグラファイトの磁性"固体物理. 39. 37-44 (2004)
[Publications] K.Kusakabe: "Indication of flat-band magnetism in theoretically designed nanographite with modified zigzag edges"Journal of Magnetism and Magnetic Materials. (in press).
[Publications] M.Marymaha: "Theoretical prediction of synthesis methods to create magnetic nanographite"Journal of Physical Society of Japan. (in press).
[Publications] K.Sugiyama, et al.: "High-Field Magnetization of PrFe_4P_<12> and PrOs_4As_<12>"J.Phys.Soc.Jpn.. (to be published).
[Publications] Katsuya Shimizu 他: "Pressure induced superconductivity in Li and Fe"Physica C. (掲載予定).
[Publications] R.Resel 他: "On the phase transition in anthracene induced by high pressure"Solid State Communications. 129. 103-106 (2004)
[Publications] 清水克哉: "Liの超伝導"固体物理. 38. 352-355 (2003)
[Publications] 清水克哉: "超高圧力下におけるリチウム金属の超伝導"FSST NEWS. 96. 12-15 (2003)

2003 Fiscal Year Annual Research Report

多元融合領域の新物質相

Principal Investigator

北岡 良雄 大阪大学, 基礎工学研究科, 教授 (70110707)

Research Products

[Publications] Y.Fuseya: "Realization of Odd-Frequency p-Wave Spin-Singlet Superconductivity Coexisting with Antiferromagnetic Order near Quantum Critical Point"Journal of the Physical Society of Japan. VoL72,No.11. 2914-2923 (2003)

[Publications] K.Morita: "FLEX Study on Enhanced Charge Susceptibility near the Antiferromagnetic Mott Transition in Two-Dimensional t-t' Hubbard Model"Journal of the Physical Society of Japan. Vol.72,No.12. 3164-3173 (2003)

[Publications] A.T.Holmes: "Signatures of Valence Fluctuations in CeCu_2Si_2 under High Pressure"The Physical Review B. Vol.69,No.2. 024508-1-024508-11 (2004)

[Publications] T.Takeuchi, et al.: "Magnetism and Superconductivity in a Heavy-fermion Superconductor CePt_3Si"J.Phys. : Condens.Matter. (to be published).

[Publications] S.Hashimoto, et al.: "de Haas-van Alphen Effect and the Fermi Surface in CePt_3Si and LaPt_3Si"J.Phys. : Condens.Matter. (to be published).

[Publications] T.D.Matsuda, et al.: "Reduced Magnetization due to the Crystalline Electric Field for T_h site Symmetry in UFe_4P_<12>"J.Phys.Soc.Jpn.. (to be published).

[Publications] Yu Kawasaki: "Exotic superconductivity in the coexistnet phase of antiferromagnetism and superconductivity in CeCu_2(Si_<0.98>Ge_<0.02>)_2: A Du-NQR study under hydrostatic pressure"Journal of the Physical Society of Japan. 73・1. 194-197 (2004)

[Publications] Tatsuya Fujimoto: "Un conventional superconductivity and electron correlations in the Cobalt Oxyhydrate Na0.35CoO2・H2O from nuclear quadrupole resonance"Physical Review Letters. 92・4. 47004-1-47004-4 (2004)

[Publications] T.Akazawa, et al.: "Pressure-induced Superconductivity in Ferromagnetic UIr without Inversion Symmetry"J.Phys. : Condens.Matter. 16. L29-L32 (2004)

[Publications] M.Nakashima, et al.: "High-pressure Effect on the Electronic State in CeNiGe_3 : Pressure-induced Superconductivity"J.Phys. : Condens.Matter. (to be published).

[Publications] M.Yamada, et al.: "Magnetic and Fermi Surface Properties in LaRh_3B_2, CeRh_3B_2 and PrRh_3B_2"J.Phys.Soc.Jpn.. (to be published).

[Publications] Y.Okuda, et al.: "Magnetic and Fermi Surface Properties of an Antiferromagnet Ce_3Sn_7"J.Phys.Soc.Jpn.. (to be published).

[Publications] T.Nakano: "μSR Study on Ferromagnetism of Potassium Clusters in Aluminosilicate Zeolite LTA"Physica B. 326. 550-555 (2003)

[Publications] T.Nakano: "Spin Cant Model of Ferromagnetism in Potassium Clusters Incorporated in Zeolite LTA"Journal of Magnetism and Magnetic Materials. 印刷中. (2004)

[Publications] D.Kiniwa: "μSR Study of Ferromagnetism in Potassium Clusters incorporated in Zeolite LTA"Journal of Magnetism and Magnetic Materials. 印刷中. (2004)

[Publications] S.Araki: "Strong uniaxial crystal field and ising like exchange interaction of ferromagnet CeAgSb_2"Journal of Magnetism and Magnetic Materials. 印刷中. (2004)

[Publications] S.Araki: "Crystal structure, magnetic ordering, and magnetic excitation in the 4f-localized ferromagnet CeAgSb_2"Physical Review B. 68. 024408 (2003)

[Publications] M.Igarashi: "NMR Study of Rb Clusters in Zeolite LTA"Physica B. 327. 72-78 (2003)

[Publications] A.Higashiya: "Resonant Inelastic X-ray Scattering(RIXS)of SrCuO_2"Solid State Commun.. (In press). (2004)

[Publications] A.Yamasaki: "Direct observation of the single-domain limit of Fe nanomagnets by spin-polarized scanning tunneling spectroscopy"Phys.Rev.Lett.. 91. 127201-1-127201-4 (2003)

[Publications] E.-J.Cho: "Auger effect in high-resolution Ce 3d-edge resonance photoemission"Phys.Rev.. B67. 155107-1-155107-6 (2003)

[Publications] J.-S.Kang: "Resonant photoemission spectroscopy study of impurity-induced melting in Cr- and Ru-doped Nd_<1/2>A_<1/2>MnO_3(A=Ca,Sr)"Phys.Rev.. B68. 012410-1-012410-4 (2003)

[Publications] S.-K.Mo: "Prominent quasiparticle peak in the photoemission spectrum of the metallic phase of V_2O_3"Phys.Rev.Lett.. 90. 186403-1-186403-4 (2003)

[Publications] R-J.Jung: "Localized character of 4f electrons in CeRh_x(x=2,3) and CeNi_x(x=3,5)"Phys.Rev.Lett.. 91. 157601-1-157601-4 (2003)

[Publications] D.Aoki, et al.: "First Observation of the de Haas-van Alphen Effect in NpNiGa_5"J.Phys.Soc.Jpn.. (to be published).

[Publications] H.Sakai et al.: "Pressure-induced weak ferromagnetisim in Uranium Dioxide UO_2"J.Phys. : Condens.Matter. 15. S2035-S2037 (2003)

[Publications] T.Mito et al.: "Magnetic ordering in the pressure-stabilized high-temperature phase of YbInCu_4"Phys.Rev.B. 67. 224409 (2003)

[Publications] T.Muramatsu et al.: "Electrical resistivity of CeTIn_5(T=Rh,Ir)under high pressure"Physica C. 388-389. 539-540 (2003)

[Publications] N.Tateiwa et al.: "A heat capacity anomaly of the superconducting transition in a ferromagnetic superconductor UGe_2"Physica C. 388-389. 527-528 (2003)

[Publications] N.Tateiwa et al.: "A heat capacity anomaly at"T^*"in ferromagnetic superconductor UGe_2"Acta Physica Polonica B. 34. 515-518 (2003)

[Publications] K.Yanai: "Possibility of pressure-induced superconductivity by phonon mechanism in Pd"Physica C. 388-389. 569-570 (2003)

[Publications] M.Maruyama: "Magnetic properties of nanographite with modified zigzag edges"Journal of Physics and Chemistry of Solids. 65. 119-122 (2004)

[Publications] 草部 浩一: "ナノグラファイトの磁性"固体物理. 39. 37-44 (2004)

[Publications] K.Kusakabe: "Indication of flat-band magnetism in theoretically designed nanographite with modified zigzag edges"Journal of Magnetism and Magnetic Materials. (in press).

[Publications] M.Marymaha: "Theoretical prediction of synthesis methods to create magnetic nanographite"Journal of Physical Society of Japan. (in press).

[Publications] K.Sugiyama, et al.: "High-Field Magnetization of PrFe_4P_<12> and PrOs_4As_<12>"J.Phys.Soc.Jpn.. (to be published).

[Publications] Katsuya Shimizu 他: "Pressure induced superconductivity in Li and Fe"Physica C. (掲載予定).

[Publications] R.Resel 他: "On the phase transition in anthracene induced by high pressure"Solid State Communications. 129. 103-106 (2004)

[Publications] 清水克哉: "Liの超伝導"固体物理. 38. 352-355 (2003)

[Publications] 清水克哉: "超高圧力下におけるリチウム金属の超伝導"FSST NEWS. 96. 12-15 (2003)

北岡良雄大阪大学, 基礎工学研究科, 教授 (70110707)

[Publications] 草部浩一: "ナノグラファイトの磁性"固体物理. 39. 37-44 (2004)