Exploring the physics of superconductivity in non-centrosymmetric heavy fermion system

2008 Fiscal Year Final Research Report

• Project/Area Number: 18684018
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: KIMURA Noriaki Tohoku University, 大学院理学研究科, 助教 (30292311)
• Project Period (FY): 2006 – 2008
• Keywords: 空間反転対称性 / 重い電子系超伝導 / 上部臨界磁場 / 量子臨界点 / 磁性と超伝導

Research Abstract

結晶の空間反転対称性が破れた重い電子系超伝導体について、上部臨界磁場の温度依存性の測定を行い、従来知られているどの超伝導物質よりも磁場によって壊れにくい性質を持っていることを明らかにし、重い電子の性質と空間反転対称性の破れによって、これまでにない超伝導の新奇な性質が発現することを証明した。

Research Products

• [Journal Article] Elec-tric-field-induced superconductivity in an insulator (2008)
  • Author(s): K. Ueno, S. Nakamura, H. Shimotani, A. Ohtomo, N. Kimura, T. Nojima, H. Aoki, Y. Iwasa, M. Kawasaki
  • Journal Title: Nature Mat 7 Pages: 855-858
  • Peer Reviewed
• [Journal Article] Fermi surface in LaRhSi_3 and CeRhSi_3 (2008)
  • Author(s): T. Terashima, M. Kimata, S. Uji, T. Sugawara, N. Kimura, H. Aoki, H. Harima
  • Journal Title: Phys. Rev B78 Pages: 205107 1-5
  • Peer Reviewed
• [Journal Article] Fermi surface properties of CeRu_2(Si1-xGex)_2 in magnetic fields above the metamagnetic transitions (2008)
  • Author(s): M. Sugi, Y. Matsumoto, N. Kimura, T. Komatsubara, H. Aoki, T. Terashima, S. Uji
  • Journal Title: Phys. Rev.latt 101 Pages: 056401 1-4
  • Peer Reviewed
• [Journal Article] Marginal breakdown of the Fer-mi-liquid state on the border of metal-lic ferromagnetism (2008)
  • Author(s): R. P. Smith, M. Sutherland, G. G. Lonzarich, S. S. Saxena, N. Kimura, S. Takashima, M. Nohara, H. Takagi
  • Journal Title: Nature 455 Pages: 1220-1223
  • Peer Reviewed
• [Journal Article] Continuous evolu-tion of fermi surface properties above metamagnetic transitions in Ce_x-La_<1-x>Ru_2Si_2 (2008)
  • Author(s): Y. Matsumoto, M. Sugi, N. Kimura, T. Komatsubara, H. Aoki, I. Satoh, T. Terashima, S. Uji
  • Journal Title: J. Phys. Soc. Jpn 77 Pages: 053703 1-4
  • Peer Reviewed
• [Journal Article] de Haas-van Alphen effect in the mixed state of LuNi_2B_2C: Anisotropy and field de-pendence of the damping due to su-perconductivity (2008)
  • Author(s): T. Isshiki, N. Kimura, H. Aoki, T. Te-rashima, S. Uji, K. Yamauchi, H. Ha-rima, D. Jaiswal-Nagar, S. Rama-krishnan, A. K. Grover
  • Journal Title: Phys. Rev B78 Pages: 134528 1-12
  • Peer Reviewed
• [Journal Article] Devel-opment of heat capacity measurement system under high pressure (2007)
  • Author(s): F. Tomioka, I. Umehara, T. Ono, M. Hedo, Y. Uwatoko, N. Kimura
  • Journal Title: Jpn. J. Appl. Phys. Part 1 - Regul. Pap. Short Notes Rev. Pap 46 Pages: 3090-3095
  • Peer Reviewed
• [Journal Article] Heat capacity of CeRhSi_3 under pressure (2007)
  • Author(s): F. Tomioka, M. Hedo, I. Umehara, T. Ono, Y. Uwatoko, N. Kimura, S. Ta-kayanagi
  • Journal Title: J. Magn. Magn. Mater 310 Pages: 340-342
  • Peer Reviewed
• [Journal Article] Fermi surface and super-conductivity in noncentrosymmetric CeRhSi_3 (2007)
  • Author(s): T. Terashima, Y. Takahide, T. Matsu-moto, S. Uji, N. Kimura, H. Aoki, H. Harima
  • Journal Title: Phys. Rev B76 Pages: 054506 1-4
  • Peer Reviewed
• [Journal Article] UGe2: Low-temperature re-sistivity measurements in a wide range of magnetic field and pressure (2007)
  • Author(s): T. Terashima, K. Enomoto, T. Konoike, T. Matsumoto, S. Uji, N. Kimura, M. Endo, T. Komatsubara, H. Aoki, K. Maezawa
  • Journal Title: J. Magn. Magn. Mater 310 Pages: E116-E117
  • Peer Reviewed
• [Journal Article] Metamagnetic transitions, electronic structures and quantum critical point of CeRu_2(Si_<1-x>Gex)_2 (2007)
  • Author(s): M. Sugi, T. Fujiwara, Y. Matsumoto, T. Isshiki, N. Kimura, T. Komatsubara, H. Aoki, I. Satoh, T. Terashima, S. Uji
  • Journal Title: J. Magn. Magn Mater 310 Pages: 331-333
  • Peer Reviewed
• [Journal Article] Angular dependent study of the peak effect phenomenon in a weakly pinned single crystal of LuNi_2B_2C (2007)
  • Author(s): D. J. Nagar, T. Isshiki, N. Kimura, H. Aoki, S. Ramakrishnan, A. K. Grover
  • Journal Title: Physica C 460 Pages: 1215-1217
  • Peer Reviewed
• [Journal Article] Crystalline Electric Field Effect and Magnetic Properties of CeRhSi_3 Single Crystal (2007)
  • Author(s): Y. Muro, M. Ishikawa, K. Hirota, Z. Hiroi, N. Takeda, N. Kimura, H. Aoki
  • Journal Title: J. Phys. Soc. Jpn 76 Pages: 033706 1-3
  • Peer Reviewed
• [Journal Article] Low-energy electrodynamics of heavy quasiparticles in ZrZn_2 (2007)
  • Author(s): S. I. Kimura, N. Kimura, H. Aoki
  • Journal Title: J. Phys. Soc. Jpn 76 Pages: 084710 1-5
  • Peer Reviewed
• [Journal Article] Normal and superconducting properties of noncentrosymmetric heavy fermion CeRhSi_3 (2007)
  • Author(s): N. Kimura, Y. Muro, H. Aoki
  • Journal Title: J. Phys. Soc. Jpn 76 Pages: 051010 1-14
  • Peer Reviewed
• [Journal Article] Extremely high upper critical magnetic field of the noncen-trosymmetric heavy fermion super-conductor CeRhSi_3 (2007)
  • Author(s): N. Kimura, K. Ito, H. Aoki, S. Uji, T. Terashima
  • Journal Title: Phys. Rev. Lett 98 Pages: 197001 1-4
  • Peer Reviewed
• [Journal Article] Incommensurate magnetic order in the pressure-induced superconductor CeRhSi_3 (2007)
  • Author(s): N. Aso, H. Miyano, H. Yoshizawa, N. Kimura, T. Komatsubara, H. Aoki
  • Journal Title: J. Magn. Magn. Mater 310 Pages: 602-604
  • Peer Reviewed
• [Journal Article] Magnetic-field and pressure dependence of low-temperature resis-tivity in Uge_2 (2006)
  • Author(s): T. Terashima, K. Enomoto, T. Konoike, T. Matsumoto, S. Uji, N. Kimura, M. Endo, T. Komatsubara, H. Aoki, K. Maezawa
  • Journal Title: Phys. Rev B73 Pages: 140406
  • Peer Reviewed
• [Journal Article] Metamagnetic transitions and elec-tronic structures of CeRu_2(Si_<1-x>Gex)_2 (2006)
  • Author(s): M. Sugi, T. Fujiwara, T. Isshiki, N. Kimura, T. Komatsubara, H. Aoki
  • Journal Title: Physica B378-80 Pages: 810-811
  • Peer Reviewed
• [Journal Article] Non-Fermi liquid and heavy fer-mion behavior in Ce_xLa_<1-x>B_6 with quadrupolar moments (2006)
  • Author(s): S. Nakamura, H. Yamamoto, M. Endo, H. Aoki, N. Kimura, T. Nojima, S. Ku-nii
  • Journal Title: Physica B378-80 Pages: 148-149
  • Peer Reviewed
• [Journal Article] Unusual evolution of the conduction-electron state in Ce_xLa_<1-x>B_6 from non-Fermi liquid to Fermi liquid (2006)
  • Author(s): S. Nakamura, M. Endo, H. Yamamoto, T. Isshiki, N. Kimura, H. Aoki, T. No-jima, S. Otani, S. Kunii
  • Journal Title: Phys. Rev. Lett 97 Pages: 237204 1-4
  • Peer Reviewed
• [Journal Article] Spin-split fermi sur-faces in Ce_xLa_<1-x>B_6 and Pr_xLa_<1-x>B_6 (2006)
  • Author(s): T. Isshiki, M. Endo, M. Sugi, N. Ki-mura, S. Nakamura, T. Nojima, H. Aoki, S. Kunii
  • Journal Title: Physica B 378-80 Pages: 604-606
  • Peer Reviewed
• [Journal Article] Sin-gle-crystal growth and magnetic properties of CeAu_2Si_2 (2006)
  • Author(s): T. Fujiwara, M. Sugi, N. Kimura, I. Satoh, T. Komatsubara, H. Aoki
  • Journal Title: Physica B 378-80 Pages: 812-814
  • Peer Reviewed
• [Journal Article] Evolution of Fermi surface properties in Ce_xLa_<1-x>B_6 and Pr_xLa_<1-x>B_6 (2006)
  • Author(s): M. Endo, S. Nakamura, T. Isshiki, N. Kimura, T. Nojima, H. Aoki, H. Ha-rima, S. Kunii
  • Journal Title: J. Phys. Soc. Jpn 75 Pages: 114704 1-11
  • Peer Reviewed
• [Journal Article] De Haas-van Alphen effect of PrB_6 in commensurate and incommensurate phases (2006)
  • Author(s): M. Endo, T. Isshiki, N. Kimura, H. Aoki, S. Kunii
  • Journal Title: Physica B 378080 Pages: 607-609
  • Peer Reviewed
• [Presentation] Strong anisotropy of the upper critical field in the non-centrosymmetric heavy fermion superconductor CeRhSi_3 (2008)
  • Author(s): N. Kimura
  • Organizer: 25th Inter-national Conference of Low Tempera-ture Physics (LT25)
  • Place of Presentation: アムステルアダム(オランダ)
  • Year and Date: 20080806-13
• [Presentation] 空間反転対称性のない重い電子系CeRhSi_3の圧力誘起超伝導の発見 (2007)
  • Author(s): 木村憲彰
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道大学
  • Year and Date: 20070921-24
• [Presentation] CeRhSi_3の圧力下超伝導の異方性 (2006)
  • Author(s): 木村憲彰
  • Organizer: 日本物理学会2006年秋季大会
  • Place of Presentation: 千葉大学
  • Year and Date: 20060923-26
• [Presentation] A New Noncentrosym-metric Heavy-fermion Superconductor CeRhSi_3 (2006)
  • Author(s): N. Kimura
  • Organizer: International Conference on Magnetism 2006 (ICM2006)
  • Place of Presentation: 京都
  • Year and Date: 20060820-25