Tetracritical point between antiferromagnetism and superconductivity in heavy-fermion systems

• Project/Area Number: 20740195
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Osaka University
• Principal Investigator: YASHIMA Mitsuharu Osaka University, 大学院・基礎工学研究科, 助教 (10397771)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2008: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 強相関系 / 超伝導 / 重い電子系 / 量子臨界点 / 圧力効果 / NMR/NQR / 磁性 / NMR / NQR

Research Abstract

We investigated the superconducting nature in the heavy-fermion systems, using the microscopic NMR/NQR method. We confirmed the strong coupling between the superconducting and antiferromagnetic order parameter around the tetracritical point, suggesting the close relationship between the superconductivity and the antiferromagnetic interactions. The present results give us a lot of important knowledge to theoretically solve the superconducting mechanism in the heavy ?fermion systems.

Research Products

• [Journal Article] Spin Susceptibility of Noncentrosymmetric Heavy-Fermion Superconductor CeIrSi3 under Pressure : ^<29>Si Knight-Shift Study on Single Crystal (2010)
  • Author(s): H.Mukuda, T.Ohara, Y.Kitaoka, R.Settai, Y.Onuki, K.M.Itoh E.E.Haller
  • Journal Title: Phys.Rev.Lett. 104 Pages: 17002-17002
  • Peer Reviewed
• [Journal Article] Origin of Tc Enhancement Induced by Doping Yttrium and Hydrogen into LaFeAsO-Based Superconductors : ^<57>Fe, ^<75>As, ^<139>La, and 1H-NMR Studies (2010)
  • Author(s): H.Yamashita, H.Mukuda, M.Yashima, S.Furukawa, Y.Kitaoka, K.Miyazawa, P.M.Shirage, H.Eisaki, A.Iyo
  • Journal Title: J.Phys.Soc.Jpn. 79 Pages: 103703-103703
  • Peer Reviewed
• [Journal Article] NMR study of Fe-oxypnictide superconductors RE-Fe-As-O (RE=Nd,Pr,La_<0.7>Y_<0.3>) (2010)
  • Author(s): Hiroki Yamashita, Mitsuharu Yashima, et al.
  • Journal Title: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Volume: 470
  • Peer Reviewed
• [Journal Article] Superconducting state of iron arsenide Ba_<1-x>K_xFe_2As_2 : ^<57>Fe and ^<75>As NMR studies (2010)
  • Author(s): Hideaki Nishimura, Mitsuharu Yashima, et al.
  • Journal Title: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Volume: 470
  • Peer Reviewed
• [Journal Article] ^<115>In-NQR study of the novel superconductivity in the heavy-fermion compounds CeIr(In_<1-x>Cd_x)_5 (2010)
  • Author(s): Mitsuharu Yashima, et al.
  • Journal Title: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Volume: 470
  • Peer Reviewed
• [Journal Article] Coherence Effect of Sign-Reversing s(+/-)-Wave Cooper Pair State in Heavily Overdoped LaFeAsO-based Superconductor : ^<75>As-Nuclear Quadrupole Resonance (2010)
  • Author(s): Hidekazu Mukuda, Mitsuharu Yashima, et al.
  • Journal Title: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN Volume: 79
  • Peer Reviewed
• [Journal Article] Origin of T-c Enhancement Induced by Doping Yttrium and Hydrogen into LaFeAsO-Based Superconductors : ^<57>Fe-, ^<75>As-, ^<139>La-, and ^1H-NMR Studies (2010)
  • Author(s): Hiroki Yamashita, Mitsuharu Yashima, et al.
  • Journal Title: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN Volume: 79
  • Peer Reviewed
• [Journal Article] Novel superconducting phases in copper oxides and iron-oxypnictides : NMR studies (2010)
  • Author(s): Yoshio Kitaoka, Mitsuharu Yashima, et al.
  • Journal Title: Journal of Physics and Chemistry of Solids Volume: (In Press)
  • Peer Reviewed
• [Journal Article] Spin Susceptibility of Noncentrosymmetric Heavy-Fermion Superconductor CeIrSi_3 under Pressure : Si-29 Knight-Shift Study on Single Crystal (2010)
  • Author(s): Hidekazu Mukuda, et al.
  • Journal Title: Physical Review Letters 104
  • Peer Reviewed
• [Journal Article] Phase diagram for antiferromagnetism and superconductivity in the pressurs-induced heayy-fermion supercnnductor Ce_2RhIn_8 probed by ^<115>In-NOR (2010)
  • Author(s): Mitsuharu Yashima, et al
  • Journal Title: Physical Review B 80
  • Peer Reviewed
• [Journal Article] Strong coupling between antiferromagnetic and superconducting order parameters of CeRhIn_5 studied by ^<115>In-nuclear quadrupole resonance spectroscopy (2009)
  • Author(s): M.Yashima H.Mukuda, Y.Y.Kitaoka, H.Shishido, R.Settai, Y.Onuki
  • Journal Title: Phys.Rev.B 79 Pages: 214528-214528
  • Peer Reviewed
• [Journal Article] Strong Coupling Spin Singlet Superconductivity with Multiple Full Gaps in Hole-Doped Ba_<0.6>K_<0.4>Fe_2As_2 Probed by ^<57>Fe-NMR (2009)
  • Author(s): M.Yashima, H.Nishimura, H.Mukuda, Y.Kitaoka, K.Miyazawa, P.M.Shirage, K.Kihou, H.Kito, H.Eisaki, A.Iyo
  • Journal Title: J.Phys.Soc.Jpn. 78 Pages: 103702-103702
  • Peer Reviewed
• [Journal Article] Phase diagram for antiferromagnetism and superconductivity in the pressure-induced heavy-fermion superconductor Ce_2RhIn_8 probed by ^<115>In-NQR (2009)
  • Author(s): M.Yashima, S.Taniguchi, H.Miyazaki, H.Mukuda, Y.Kitaoka, H.Shishido, R.Settai Y.Onuki
  • Journal Title: Phys.Rev.B 80 Pages: 184503-184503
  • Peer Reviewed
• [Journal Article] Strong-Coupling Spin-Singlet Superconductivity with Multiple Full Gaps in Hole-Doped Ba_<0.6>K_<0.4>Fe_2As_2 Probed by ^<57>Fe-NMR (2009)
  • Author(s): Mitsuharu Yashima, et al.
  • Journal Title: Journal of the Physical Society of Japan 78
  • Peer Reviewed
• [Journal Article] Doping Dependence of Normal-State Properties in Iron-Based Oxypnictide Superconductor LaFeAsO_<1-y> Probed by ^<57>Fe-NMR and ^<75>As-NMR/NQR (2009)
  • Author(s): Hidekazu Mukuda, et al.
  • Journal Title: Journal of the Physical Society of Japan 78
  • Peer Reviewed
• [Journal Article] Strong coupling between antiferromagnetic and superconducting order parameters of CeRhIn_5 studied by ^<115>In- nuclear quadrupole resonance spectroscopy (2009)
  • Author(s): Mitsuharu Yashima, et al.
  • Journal Title: Physical Review B 79
  • Peer Reviewed
• [Journal Article] Novel superconducting characteristics and unusual normal-state properties in iron-based pnictide superconductors : (FeNMR)^<-57>Fe and (75)AsNQR/NMR studies in REFeAsO1-y (RE = La, Pr, Nd) and Ba_<0.6>K_<0.4>Fe_2As_2 (2009)
  • Author(s): Hidekazu Mukuda, et al.
  • Journal Title: PHYSICA C 469 Pages: 559-565
  • Peer Reviewed
• [Journal Article] Magnetic Field Evolution of a Novel Phase Transition in CeO_<s4>Sb_<12> : ^<121>Sb NMR Study (2009)
  • Author(s): Mamoru Yogi, et al.
  • Journal Title: Journal of the Physical Society of Japan 78
  • Peer Reviewed
• [Journal Article] Spin Fluctuations and Unconventional Superconductivity in the Fe-Based Oxypnictide Superconductor LaFeAsO_<0.7> Probed by ^<57>Fe-NMR (2009)
  • Author(s): Hidekazu Mukuda, et.al.
  • Journal Title: Journal of the Physical Society of Japan 78
  • Peer Reviewed
• [Journal Article] ^<75>As-NQR/NMR studies on oxygen-deficient iron-based oxypnictide superconductors LaFeAsO_<1-y>(y=0, 0.25, 0.4) and NdFeASO_<0.6> (2008)
  • Author(s): Hidekazu Mukuda, et.al.
  • Journal Title: Journal of the Physical Society of Japan 77
  • Peer Reviewed
• [Presentation] 鉄系超伝導体Ba_<1-x>K_xFe_2As_2のFe-NMR (2011)
  • Author(s): 八島光晴
  • Organizer: 日本物理学会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-28
• [Presentation] La_<0.05>Y_<0.9>5FeAsO_<1-y>Hx(Tc=50K)におけるAs-NMR/NQR (2011)
  • Author(s): 古川哲試、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-28
• [Presentation] ペロブスカイトブロック層をもつ鉄系超伝導体のNMR/NQR (2011)
  • Author(s): 木内宏彰、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-26
• [Presentation] 鉄系超伝導体Ba_<0.6>K_<0.4>Fe_2As_2の圧力効果:Fe-NMRによる研究 (2011)
  • Author(s): TSENDSUREN DULGUUN、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-25
• [Presentation] LaFeAs(O,F)系のオーバードープ域における^<75>As-NQR II (2011)
  • Author(s): 新田真理子、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-25
• [Presentation] NMR/NQR Studies on Iron-pnictide Superconductors (2011)
  • Author(s): 椋田秀和、八島光晴, et al.
  • Organizer: International workshop on Novel Superconductors and Super Materials 2011 (NS22011)
  • Place of Presentation: 日本科学未来館
  • Year and Date: 2011-03-07
• [Presentation] Pressure Effects on Superconductivity of Optimally doped Ba_<0.6>K_<0.4>Fe_2As_2 Fe-NMR (2011)
  • Author(s): Dulguun Tsendsuren、八島光晴, et al.
  • Organizer: International workshop on Novel Superconductors and Super Materials 2011 (NS22011)
  • Place of Presentation: 日本科学未来館
  • Year and Date: 2011-03-07
• [Presentation] ^<75>As-NMR/NQR Study of Iron-Based Superconductors with Perovskite-type Blocking Layer (2011)
  • Author(s): 木内宏彰、八島光晴, et al.
  • Organizer: International workshop on Novel Superconductors and Super Materials 2011 (NS22011)
  • Place of Presentation: 日本科学未来館
  • Year and Date: 2011-03-07
• [Presentation] NMR/NQRによるLa-Fe-As-O系の超伝導状態 (2010)
  • Author(s): 椋田秀和、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-24
• [Presentation] 重い電子系化合物CeRhIn_5とCe_2RhIn_8におけるIn-NQRによる研究 (2010)
  • Author(s): 八島光晴
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] 鉄砒素化合物Ba_<1-x>K_xFe_2As_2のFe-NMR (2010)
  • Author(s): 西村英哲、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] LaFeAs(O,F)系のオーバードープ域における^<75>As-NQR (2010)
  • Author(s): 新田真理子、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] LaFeAsO系におけるYまたはH置換効果:^<57>Fe&^<75>As-NMR (2010)
  • Author(s): 古川哲試、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] 重い電子系超伝導体CeIr(In_<1-x>Cd_x)_5の^<115>In-NQRによる研究 (2010)
  • Author(s): 植松克吉、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] 重い電子系化合物CePtSi_2のNMRによる研究(常圧) (2010)
  • Author(s): 畦森達也、八島光晴, et al.
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] NMR study on heavy fermion compound CePtSi2 at ambient pressure (2010)
  • Author(s): 八島光晴
  • Organizer: Strongly Correlated Electron Systems (SCES2010)
  • Place of Presentation: Santa Fe (USA)
  • Year and Date: 2010-07-01
• [Presentation] NMR study on heavy fermion compound CePtSi_2 at ambient pressure (2010)
  • Author(s): 八島光晴, et al.
  • Organizer: Strongly Correlated Electron Systems (SCES 2010)
  • Place of Presentation: Santa Fe (USA)
  • Year and Date: 2010-07-01
• [Presentation] NMR Study on iron-pnictide high-Tc Superconductors (2010)
  • Author(s): 椋田秀和、八島光晴, et al.
  • Organizer: International conference on Core Research and Engineering Science of Advanced Materials (GCOE)
  • Place of Presentation: 大阪大学
  • Year and Date: 2010-06-02
• [Presentation] Preessure-temperature phase diagram of superconductivity in heavy fermion compounds CeIr(In_<1-x>Cd_x)_5 studied by In-NQR measurements (2010)
  • Author(s): 八島光晴
  • Organizer: International conference on Core Research and Engineering Science of Advanced Materials (GCOE)
  • Place of Presentation: 大阪大学
  • Year and Date: 2010-05-31
• [Presentation] 鉄系超伝導体Ba_<1-x>K_xFe_2As_2における^<57>Fe-NMR (2009)
  • Author(s): 八島光晴
  • Organizer: TRIP第3回領域会議
  • Place of Presentation: 東京大学小柴ホール(東京都)
  • Year and Date: 2009-12-12
• [Presentation] In-NQRによるCe_2RhIn_8の圧カ-温度相図 (2009)
  • Author(s): 八島光晴
  • Organizer: 物性科学領域横断研究会-凝縮系科学の最前線
  • Place of Presentation: 東京大学武田ホール(東京都)
  • Year and Date: 2009-11-30
• [Presentation] 鉄系超伝導体La_<1-x>Y_x FeAsOyのNMRによる研究 (2009)
  • Author(s): 山下裕貴
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス(熊本市)
  • Year and Date: 2009-09-27
• [Presentation] Ba_<1-x>K_xFe_2As_2のFe-NMRによる研究 (2009)
  • Author(s): 西村英哲
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス(熊本市)
  • Year and Date: 2009-09-27
• [Presentation] Ba(Fe_<1-x>Co_x)_2As_2の^<57>Feおよび^<75>As-NMR (2009)
  • Author(s): 田村伸克
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス(熊本市)
  • Year and Date: 2009-09-27
• [Presentation] CeTx_4Sb_<12>のSb-NMR/NQRによる研究III (2009)
  • Author(s): 與儀護
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス(熊本市)
  • Year and Date: 2009-09-26
• [Presentation] NMR Study of Iron-oxypnictide Superconductors REFeAsO<1-y>(RE=La,Pr,Nd) (2009)
  • Author(s): Hiroki Yamashita
  • Organizer: The 9th International Conference on Materials and Mechanisms of Superconductivity(M2S-IX)
  • Place of Presentation: 京王プラザホテル(東京都)
  • Year and Date: 2009-09-09
• [Presentation] ^<115>In-NQR Study of the Novel Superconductivity in the Heavy-Fermion Compounds CeIr(In_<1-x>Cd_x)_5 (2009)
  • Author(s): 八島光晴
  • Organizer: The 9th International Conference on Materials and Mechanisms of Superconductivity (M2S-IX)
  • Place of Presentation: 京王プラザホテル(東京都)
  • Year and Date: 2009-09-08
• [Presentation] ^<115>In-NQR Study of the Novel Superconductivity in the Heavy-Fermion Compounds CeIr(In_<1-x>Cd_x)_5 (2009)
  • Author(s): Mitsuharu Yashima
  • Organizer: The 9th International Conference on Materials and Mechanisms of Superconductivity(M2S-IX)
  • Place of Presentation: 京王プラザホテル(東京都)
  • Year and Date: 2009-09-08
• [Presentation] Novel Superconductivity in CeIr(In_<1-x>Cd_x)_5 Studied by In-NQR Measurements (2009)
  • Author(s): Mitsuharu Yashima
  • Organizer: The 18th International Conference on Magnetism (ICM2009)
  • Place of Presentation: Congress Center Karlsruhe (Karlsruhe, Germany)
  • Year and Date: 2009-07-30
• [Presentation] Pressure-Temperature Phase Diagram in Ce_2RhIn_8 Studied by In-NQR Measurements (2009)
  • Author(s): 八島光晴
  • Organizer: The 18th International Conference on Magnetism (ICM2009)
  • Place of Presentation: Karlsruhe(Germany)
  • Year and Date: 2009-07-27
• [Presentation] Novel Superconductivity in CeIr(In_<1-x>Cd_x)_5 Studied by In-NQR Measurements (2009)
  • Author(s): 八島光晴
  • Organizer: The 18th International Conference on Magnetism (ICM2009)
  • Place of Presentation: Karlsruhe(Germany)
  • Year and Date: 2009-07-27
• [Presentation] Pressure-Thmperature phase Diagram in Ce_2RhIn_8 Studied by In-NQR Measurements (2009)
  • Author(s): Mitsuharu Yashima
  • Organizer: The 18th International Conference on Magnetism (ICM2009)
  • Place of Presentation: Congress Center Karlsruhe (Karlsruhe, Germany)
  • Year and Date: 2009-07-27
• [Presentation] CeRhIn_5の磁気構造の圧力変化と超伝導の関係 (2008)
  • Author(s): 八島光晴
  • Organizer: 日本物理学会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-22
• [Presentation] REOFeAs系超伝導体におけるNMR/NQR (2008)
  • Author(s): 寺崎伸幸, et.al.
  • Organizer: 日本物理学会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-22
• [Presentation] 空間反転対称性のない重い電子系超伝導体CeIrSi_3に却ける圧力下Si-NMR II (2008)
  • Author(s): 小原崇, et.al.
  • Organizer: 日本物理学会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-21
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