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Novel Physics of non-centrosymmetric superconductors

Research Project

Project/Area Number 20244058
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionOkayama University

Principal Investigator

ZHENG Guo-qing (ZHENG Guo-Qing)  岡山大学, 大学院・自然科学研究科, 教授 (50231444)

Co-Investigator(Kenkyū-buntansha) INADA Yoshihiko  岡山大学, 大学院・教育学研究科, 教授 (80273572)
KAWASAKI Shinji  岡山大学, 大学院・自然科学研究科, 講師 (80397645)
ICHIOKA Masanori  岡山大学, 大学院・自然科学研究科, 教授 (90304295)
Co-Investigator(Renkei-kenkyūsha) SAKURAI Yoshiharu  高輝度光科学研究センター, 副主席研究員 (90205815)
Project Period (FY) 2008 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥47,320,000 (Direct Cost: ¥36,400,000、Indirect Cost: ¥10,920,000)
Fiscal Year 2011: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2010: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2009: ¥22,880,000 (Direct Cost: ¥17,600,000、Indirect Cost: ¥5,280,000)
Fiscal Year 2008: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Keywords超伝導 / 磁気共鳴 / 空間反転対称性の破れ / スピン軌道相互作用 / 核磁気共鳴 / 超伝導状態 / スピン三重項超伝導 / 各磁器共鳴 / 空間反転対称性
Research Abstract

We have grown polycrystal samples of non-centrosymmetric superconductors Li_2(Pt_<1-x> Pd_x)_3B and studied the evolution of the superconducting state by NMR. We found that the superconducting state changes abruptly at x~ 0. 8. By analyzing the crystal structure, we found that the Pt(Pd) B_6 tilts abruptly beyond x~ 0. 8, which enhances the spin-orbit coupling and is responsible for the change in the superconducting state properties. We have also studied other non-centrosymmetric superconductors such as Mg_10Ir_19B_16 and Re_7B_3. The results also suggest that the local structure distortion is effective in enhancing the degree of inversion symmetry-breaking.

Report

(6 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report   Self-evaluation Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (50 results)

All 2012 2011 2010 2009 2008 Other

All Journal Article (27 results) (of which Peer Reviewed: 26 results) Presentation (17 results) Book (1 results) Remarks (5 results)

  • [Journal Article] Antiferromagnetic Spin Fluctuations above the Dome-Shaped and Full-Gap Superconducting States of LaFeAsO_<1-x> F_x Revealed by^<75> As-Nuclear Quadrupole Resonance2012

    • Author(s)
      T. Oka, Z. Li, S. Kawasaki, G. F. Chen, N. L. Wang, and G.-Q. Zheng
    • Journal Title

      Phys. Rev. Lett.

      Volume: 108

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Antiferromagnetic Spin Fluctuations above the Dome-Shaped and Full-Gap Superconducting States of LaFeAsO_<1-x>F_x Revealed by ^<75>As-Nuclear Quadrupole Resonance2012

    • Author(s)
      T.Oka
    • Journal Title

      Phys.Rev.Lett.

      Volume: 108 Issue: 4

    • DOI

      10.1103/physrevlett.108.047001

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic phase diagram of Li_2(Pd_<1-x> Pt_x)_3B by ac susceptometry.2011

    • Author(s)
      D. C. Peets, G. Eguchi, M. Kriener, S. Harada, Sk. Md. Shamsuzzamen, Y. Inada, G.-Q. Zheng, and Y. Maeno
    • Journal Title

      Phys. Rev. B

      Volume: 84

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Nodeless energy gaps of single-crystalline Ba_<0. 68> K_<0. 32> Fe_2As_2 as seen via^<75> As NMR2011

    • Author(s)
      Z. Li, D. L. Sun, C. T. Lin, Y. H. Su, J. P. Hu, and G.-Q. Zheng
    • Journal Title

      Phys. Rev. B

      Volume: 83 Pages: 1-4

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic phase diagram of Li2(Pd1-xPtx)3B by ac susceptometry2011

    • Author(s)
      D.C.Peets, 江口学, M.Kriener, 原田翔太, 〓k.Md.〓hamsuzzaman, 稲田佳彦, 鄭国慶, 前野悦輝
    • Journal Title

      Physical Review B

      Volume: 84 Issue: 5 Pages: 54-521

    • DOI

      10.1103/physrevb.84.054521

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nodeless energy gaps of single-crystalline Ba0.68K0.32Fe2As2 as seen via 75As NMR2011

    • Author(s)
      Z.Li
    • Journal Title

      Phys.Rev.B

      Volume: 83 Issue: 14

    • DOI

      10.1103/physrevb.83.140506

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic phase diagram of Li2 (Pd1-xPtx) 3B by ac susceptometry2011

    • Author(s)
      D.C.Peets
    • Journal Title

      Phys.Rev.B

      Volume: 84

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nodeless energy gaps of single-crystalline Ba0.68K0.32Fe2As2 asseen via 75As NMR2011

    • Author(s)
      Z.Li
    • Journal Title

      Phys.Rev.B

      Volume: 83

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] As-NMR/NQR study of pressure-induced superconductivity in CaFe2As22011

    • Author(s)
      S.Kawasaki
    • Journal Title

      Journal of Physics and Chemistry of Solids

      Volume: 72 Pages: 501-504

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pressure-induced unconventional superconductivity near a quantum critical point in CaFe_2As_22010

    • Author(s)
      S. Kawasaki, T Tabuchi, X. F. Wang, X H Chen and G.-Q. Zheng
    • Journal Title

      Supercond. Sci. Technol.

      Volume: 23

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] ^<11> B and^<195> Pt NMR study of the superconductors Li_2(Pd_<1-x> Pt_x)_3B without inversion symmetry2010

    • Author(s)
      S. Harada, Y. Inada, G.-Q. Zheng
    • Journal Title

      Physica C

      Volume: 470 Pages: 1089-1091

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Carrier concentration dependence of the pseudogap ground state of superconducting Bi_2Sr_<2-x> La_xCuO_6 revealed by^<63, 65> Cu nuclear magnetic resonance in very high magnetic fields2010

    • Author(s)
      S. Kawasaki, G.-Q. Zheng(他3名)
    • Journal Title

      Phys. Rev. Lett.

      Volume: 105

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] ^<75> As NQR and NMR Studies of Superconductivity and Electron Correlations in Iron Arsenide LiFeAs2010

    • Author(s)
      Z. Li, M. Ichioka, G.-Q. Zheng(他4名)
    • Journal Title

      J. Phys. Soc. Jpn

      Volume: 79

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] ^<11>B and ^<195>Pt NMR study of the superconductors Li_2(Pd_<1-x>Pt_x)_3B without inversion symmetry2010

    • Author(s)
      S.Harada, Y.Inada, G.-O.Zheng
    • Journal Title

      Physica C 470

      Pages: 1089-1091

    • Related Report
      2010 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] Carrier concentration dependence of the pseudogap ground state of superconducting Bi_2Sr_<2-x>La_xCuO_6 revealed by^<63,65> Cu nuclear magnetic resonance in very high magnetic fields2010

    • Author(s)
      S.Kawasaki, G.-O.Zheng, 他3名
    • Journal Title

      Phys.Rev.Lett. 105

    • Related Report
      2010 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] ^<75>As NQR and NMR Studies of Superconductivity and Electron Correlations in Iron Arsenide LiFeAs2010

    • Author(s)
      Z.Li, M.Ichioka, G.-O.Zheng, 他4名
    • Journal Title

      J.Phys.Soc.Jpn 79

    • Related Report
      2010 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] Superconducting state in the noncentrosymmetric Mg_<9. 3> Ir_<19> B_<16. 7> and Mg_<10. 5> Ir_<19> B_<17. 1> revealed by NMR2009

    • Author(s)
      K. Tahara, Z. Li, H. X. Yang, J. L. Luo, S. Kawasaki, and G.-Q. Zheng
    • Journal Title

      Phys. Rev. B

      Volume: 80

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba_<0. 7> K_<0. 3> Fe_2As_2 : NMR in a single crystal2009

    • Author(s)
      K. Matano, M. Ichioka and G.-Q. Zheng(他3名)
    • Journal Title

      Europhys. Lett.

      Volume: 87

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Superconducting state in the noncentrosymmetric Mg_<9.3>Ir_<19>B_<16.7> and Mg_<10.5>Ir_<19>B_<17.1> revealed by NMR2009

    • Author(s)
      K.Tahara, Z.Li, H.X.Yang, J.L.Luo, S.Kawasaki, G.-O.Zheng
    • Journal Title

      Phys.Rev.B 80

    • Related Report
      2010 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba_<0.7>K_<0.3>Fe_2As_2 : NMR in a single crystal2009

    • Author(s)
      K.Matano, M.Ichioka, G.-O.Zheng, 他3名
    • Journal Title

      Europhys.Lett. 87

    • Related Report
      2010 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] Superconducting state in the noncentrosymmetric Mg9.3Ir19B16.7 and Mg10.5Ir19B17.1 revealed by NMR2009

    • Author(s)
      K.Tahara
    • Journal Title

      Pays. Rev. B 80

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Superconducting Gap and Valence Band of Mg10Ir19B16 Studied by Laser and Synchrotron Photoemission Spectroscopy2009

    • Author(s)
      R.Yoshida
    • Journal Title

      J. PHYS. SOC. JPN 78

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Measurement of electron correlations in LixCoO2(x=0.0-0.35)using 59Co nuclear magnetic resonance and nuclear quadrupole resonance techniques2009

    • Author(s)
      S.Kawasaki
    • Journal Title

      Phys. Rev. B 79

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article]2009

    • Author(s)
      福山秀敏
    • Journal Title

      超伝導ハンドブック(朝倉書店)

      Pages: 195-198

    • Related Report
      2009 Annual Research Report
  • [Journal Article] Two superconducting gaps in LaFeAsOO. 92F0. 08 revealed by 75As nuclearquadrupole resonance2008

    • Author(s)
      S. Kawasaki
    • Journal Title

      Phys. Rev. B 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spin-singlet superconductivity with multiple gaps in PrOO. 89F0. llFeAs2008

    • Author(s)
      K. Matano
    • Journal Title

      Europhys. Lett. 83

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hydration-induced anisotropic spin fluctuations in NaxCoO2*1. 3H2O superconductor2008

    • Author(s)
      K. Matano
    • Journal Title

      Europhys. Lett. 84

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] Non-centrosymmetric compounds as possible candidates for topological superconductors2011

    • Author(s)
      G.-Q. Zheng
    • Organizer
      Kavli International Workshop on "Topological Insulator and Topological Superconductor"
    • Place of Presentation
      Beijing, China
    • Year and Date
      2011-08-24
    • Related Report
      2011 Final Research Report
  • [Presentation] Non-centrosymmetric compounds as possible candidates for topological superconductors2011

    • Author(s)
      G.Q.Zheng
    • Organizer
      Kavli International Workshop on"Topological Insulator and Topological Superconductor
    • Place of Presentation
      Beijing, China
    • Year and Date
      2011-08-24
    • Related Report
      2011 Annual Research Report
  • [Presentation] Non-centrosymmetric compounds as possible candidates for topological superconductors2011

    • Author(s)
      G.Q.Zheng
    • Organizer
      Kavli International Workshop on "Topological Insulator and Topological Superconductor"
    • Place of Presentation
      Beijing, China(招待講演)
    • Year and Date
      2011-08-24
    • Related Report
      2010 Annual Research Report
  • [Presentation] Spin-orbit coupling, anisotropic magnetic fluctuations, and fully-gapped superconducting state in the iron-pnictides2011

    • Author(s)
      G.Q.Zheng
    • Organizer
      The 26th international conference on low temperature physics (LT26)
    • Place of Presentation
      Beijing, China
    • Year and Date
      2011-08-15
    • Related Report
      2011 Annual Research Report
  • [Presentation] Spin-orbit coupling, anisotropic magnetic fluctuations, and fully-gapped superconducting state in the iron-pnictides2011

    • Author(s)
      G.Q.Zheng
    • Organizer
      The 26th international conference on low temperature physics (LT26)
    • Place of Presentation
      Beijing, China(招待講演)
    • Year and Date
      2011-08-15
    • Related Report
      2010 Annual Research Report
  • [Presentation] Spin-orbit coupling, anisotropic magnetic fluctuations, and fully-gapped superconducting state in the iron-pnictides2011

    • Organizer
      The 26th international conference on low temperature physics(LT26)
    • Place of Presentation
      Beijing, China
    • Related Report
      2011 Final Research Report
  • [Presentation] ^<11> B & ^<195> Pt NMR study of the superconductor Li_2(Pd_<1-x> Pt_x)_3B without inversion symmetry2009

    • Author(s)
      S. Harada, Y. Inada, G.-Q. Zheng
    • Organizer
      22nd International Symposium on Superconductivity
    • Place of Presentation
      Tsukuba, Japan
    • Year and Date
      2009-11-02
    • Related Report
      2011 Final Research Report
  • [Presentation] ^<11>B & ^195Pt NMR study of the superconductor Li_2(Pd_<1-x>Pt_x)_3B without inversion symmetry2009

    • Author(s)
      S.Harada, Y.Inada, G.-Q.Zheng,
    • Organizer
      22nd International Symposium on Superconductivity
    • Place of Presentation
      Tsukuba, Japan
    • Year and Date
      2009-11-02
    • Related Report
      2010 Self-evaluation Report
  • [Presentation] NMR studies on non-centrosymmetric superconductors Li2(Pt, Pd)3B2009

    • Author(s)
      G.-q.Zheng(鄭国慶)
    • Organizer
      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
      2009-09-12
    • Related Report
      2009 Annual Research Report
  • [Presentation] Novel superconducting state due to broken inversion symmetry in Li_2(Pd_<1-x> Pt_x)_3B and Mg_<10-x> Ir_19B_<16+ x> revealed by NMR2009

    • Author(s)
      G.-Q. Zheng
    • Organizer
      International Symposium on Novel Spin Pairing 2009(NSP2009)
    • Place of Presentation
      Kyoto, Japan
    • Related Report
      2011 Final Research Report
  • [Presentation] NMR studies on non-centrosymmetric superconductors Li_2(Pt, Pd)_3B2009

    • Author(s)
      G.-Q. Zheng
    • Organizer
      9th International Conference on Materials and Mechanisms of Superconductivity
    • Place of Presentation
      Tokyo, Japan
    • Related Report
      2011 Final Research Report
  • [Presentation] 空間反転対称性が破れた超伝導体のNMRによる研究2009

    • Author(s)
      澤岡浩貴, 原田翔太, 川島健司, 秋光純, 鄭国慶
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      大阪府立大学
    • Related Report
      2011 Final Research Report 2010 Self-evaluation Report
  • [Presentation] 空間反転対称性が破れた超伝導体Li_2(Pd_<1-x> Pt_x)_3BのNMRによる研究2009

    • Author(s)
      原田翔太, Sk. Md. Shamsuzzaman, 稲田佳彦, 鄭国慶
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      大阪府立大学
    • Related Report
      2011 Final Research Report
  • [Presentation] Novel superconducting state due to broken inversion symmetry in Li_2(Pd_<1-x>Pt_x)_3B and Mg_<10-x>Ir_<19>B_<16+x> revealed by NMR2009

    • Author(s)
      G.-Q.Zheng
    • Organizer
      International Symposium on Novel Spin Pairing 2009(NSP2009)
    • Place of Presentation
      Kyoto, Japan(招待講演)
    • Related Report
      2010 Self-evaluation Report
  • [Presentation] NMR studies on non-centrosymmetric superconductors Li_2(Pt,Pd)_3B2009

    • Author(s)
      G.-Q.Zheng
    • Organizer
      9th International Conference on Materials and Mechanisms of Superconductivity
    • Place of Presentation
      Tokyo, Japan(招待講演)
    • Related Report
      2010 Self-evaluation Report
  • [Presentation] 空間反転対称性が破れた超伝導体Li_2(Pd_<1-x>Pt_x)_3BのNMRによる研究2009

    • Author(s)
      原田翔太, Sk.Md.Shamsuzzaman, 稲田佳彦, 鄭国慶
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      大阪府立大学
    • Related Report
      2010 Self-evaluation Report
  • [Presentation] Superconductors without Spatial Inversion Symmetry : Experiment2008

    • Author(s)
      G. -q. Zheng
    • Organizer
      International Workshop on Spin Heliclty and Chirality in Superconductor and Semiconductor Xanostructures
    • Place of Presentation
      The University of Karlsruhe
    • Related Report
      2008 Annual Research Report
  • [Book] 超伝導ハンドブック2009

    • Author(s)
      鄭国慶, 他
    • Publisher
      朝倉書店
    • Related Report
      2011 Final Research Report 2010 Self-evaluation Report
  • [Remarks]

    • URL

      http://www.physics.okayama-u.ac.jp/zheng_homepage

    • Related Report
      2011 Final Research Report
  • [Remarks]

    • URL

      http://www.physics.okayama-u.ac.jp/Zheng_homepage

    • Related Report
      2011 Annual Research Report
  • [Remarks] ホームページ等

    • URL

      http://www.physics.okayama-u.ac.jp/zheng_homepage

    • Related Report
      2010 Self-evaluation Report
  • [Remarks]

    • URL

      http://www.physics.okayama-u.ac.jp/zheng_homepage/

    • Related Report
      2010 Annual Research Report
  • [Remarks]

    • URL

      http://www.physics.okayama-u.ac.jp/zheng.homepage/

    • Related Report
      2008 Annual Research Report

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Published: 2008-04-01   Modified: 2020-05-15  

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