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2013 Fiscal Year Final Research Report

Neutron scattering spectroscopic study on superconducting-antiferromagnetic phase diagram and pseudo-gap state

Research Project

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Project/Area Number 22244039
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionHigh Energy Accelerator Research Organization (2012-2013)
Tohoku University (2010-2011)

Principal Investigator

YAMADA Kazuyoshi  大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 所長 (70133923)

Co-Investigator(Kenkyū-buntansha) FUJITA Masaki  東北大学, 金属材料研究所, 教授 (20303894)
OHOYAMA Kenji  東北大学, 金属材料研究所, 准教授 (60241569)
WATANABE Takao  弘前大学, 理工学研究科, 教授 (40431431)
TOMIYASU Keisuke  東北大学, 大学院理学研究科, 助教 (20350481)
HIRAKA Haruhiro  東北大学, 東北大学, 助教 (90323097)
MATSUURA Masato  東北大, 金属材料研究所, 助教 (30376652)
SATO Toyoto  東北大学, 金属材料研究所, 助教 (20455851)
Co-Investigator(Renkei-kenkyūsha) YAMAGUCHI Yasuo  東北大学, 金属材料研究所, 産学官連携研究員 (80005917)
ARAI Masatoshi  (独)日本原子力研究開発機構, J-PARC センター, 研究主席 (30175955)
SHISHIDO Touetsu  東北大学, 金属材料研究所, 准教授 (50125580)
Project Period (FY) 2010-04-01 – 2014-03-31
Keywords中性子散乱 / 高温超伝導 / 反強磁性 / 擬キャップ / X線散乱 / 金属磁性 / 大型単結晶 / 偏極中性子
Research Abstract

Combination of neutron scattering and large crystal-growth techniques obtained new and important results on the relation between magnetism and electric conductivity for metallic magnets including superconductors.
(1)The magnetic-superconducting phase diagram was comprehensively studied for cuprate superconductors by neutron scattering and X-ray scattering. As a result, we succeeded in discriminating common and material-dependent features of the phase diagram, which provide key information towards higher superconducting transition temperature.We proposed a simple model to describe qualitatively the unique and common magnetic excitation of metallic magnets which cannot be understood by a conventional spin-wave model.
(2)High quality large single crystal of Cu2MnAl was reproducibly obtained and vertically focused neutron polarizer was constructed for the first time in Japan.

  • Research Products

    (14 results)

All 2014 2013 2012 2011

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (4 results)

  • [Journal Article] High-energy spin and charge excitations in electron-doped co opper oxide superconductors2014

    • Author(s)
      K. Ishii, M. Fujita, K. Yamada
    • Journal Title

      Nature Commun.

    • DOI

      10.1038/ncomms4714

    • Peer Reviewed
  • [Journal Article] pin-StripeDensity Varies Linearly With the Hole Content in Single-Layer Bi_2<+x>Sr_<2-x>CuO_<6+y> Cuprate Superconductors2013

    • Author(s)
      M. Enoki, M. Fujita, K. Yamada
    • Journal Title

      Phys. Rev. Lett.

      Volume: 110 Pages: 017004(1)-017004(5)

    • DOI

      10.1103/PhysRevLett.110.017004

    • Peer Reviewed
  • [Journal Article] High magnetic excitations in underdoped La_<1.90>Sr_<0.10>CuO_42013

    • Author(s)
      K. Sato, M. Matsuura, K. Yamada J. Korean Phys. Soc.
    • Journal Title

      J. Korean Phys. Soc.

      Volume: 62 Pages: 1836-1839

    • DOI

      10.3938/jkps.62.1836

    • Peer Reviewed
  • [Journal Article] Dual Structure of Low-Energy Spin Fluctuations in La_<1.80>Sr_0.14Ce_<0.06>CuO_42013

    • Author(s)
      M. Enoki, M. Fujita, K. Yamada
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 82 Pages: 114707(1)-114707(6)

    • DOI

      10.7566/JPSJ.82.114707

    • Peer Reviewed
  • [Journal Article] Progress in Neutron Scattering Studies of Spin Excitations in High-T_c Cuprates2012

    • Author(s)
      M. Fujita, H. Hiraka, K. Yamada
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 81 Pages: 011007(1)-011007(19)

    • Peer Reviewed
  • [Journal Article] Ni-Substituution Effec cts on the S Spin Dynamics and Supercon nductivity i in La_<1.85>Sr_<0.15>CuO_42012

    • Author(s)
      M. Matsuurra, M. Fujita, K. Yamada
    • Journal Title

      Phys Rev. B.

      Volume: 86 Pages: 134529(1)-134529(8)

    • DOI

      10.1103/PhysRevB.86.134529

    • Peer Reviewed
  • [Journal Article] Hidden Itinerant-Spin Phase in Heavily Overdoped La_<2-x>Sr_x_CuO_4 Superconductors Revealed by Dilute Fe Doping: A Combined Neutron Scattering and Angle-Resolved Photoemission Stud2011

    • Author(s)
      Rui-Hua He, M. Fujita, K. Yamada
    • Journal Title

      Phys. Rev Lett.

      Volume: 106 Pages: 127002 (1)-127002 (5)

    • DOI

      10.1103/PhysRevLett.107.127002

    • Peer Reviewed
  • [Journal Article] Detailed Structure of the Low-Energy Magnetic Dispersion of the Diagonal Incommensurate Phase in La_<1.975>Sr_0.025CuO_42011

    • Author(s)
      M. Matsuda, J. A.Fernandez-Baca, M.Fujita, K. Yamada and J. M. Tranquada
    • Journal Title

      Phys Rev.

      Volume: B84 Pages: 104524(1)-104524 (7)

    • Peer Reviewed
  • [Journal Article] Application of Hot-Pressed Ge-Crystal Monochromators for Reactor-Based Neutron Beam Experiments2011

    • Author(s)
      H. Hiraka, Y. Miyake, K. Yamada
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 80(Suppl. B) Pages: SB012(1)- SB012(4)

    • DOI

      10.1143/JPSJS.80SB.SB01

    • Peer Reviewed
  • [Journal Article] 幾何学的フラストレート磁性体にひそむ階層的なスピン分子励起2011

    • Author(s)
      富安啓輔, 山田和芳
    • Journal Title

      日本物理学会誌

      Volume: 66(5) Pages: 36

    • URL

      http://ci.nii.ac.jp/els/110008661941.pdf?id=ART0009742775&type=pdf&lang=jp&host=cinii&order_no=&ppv_type=0&lang_sw=&no=1402293073&cp=

    • Peer Reviewed
  • [Presentation] Magnetic excitations in high-T_c superconductors and antiferromagnetic metals2013

    • Author(s)
      K. Yamada
    • Organizer
      International Symposium on Frontier of Superconductivity Research
    • Place of Presentation
      Beijing, China, Invited talk
    • Year and Date
      2013-10-24
  • [Presentation] 反強磁性金属Mn3Siにおける磁気励起の研究 ~四季でのパルス中性子非弾性散乱実験~2012

    • Author(s)
      平賀晴弘, 奈良壮, 山口泰男, 崔純彰, 大山研司, 池内和彦, Sungdae Ji,梶本 亮一,中村充孝, 稲村泰弘, 新井正敏, 山田和芳
    • Organizer
      日本物理学会2012年 秋季大会
    • Place of Presentation
      横浜国立大学
    • Year and Date
      2012-09-20
  • [Presentation] Two types of spin dynamics in novel antiferromagnetic high T_c superconductors, Second Joint Super‐ PIRE REIMEI Workshop2012

    • Author(s)
      K. Yamada
    • Organizer
      Hyatt Regency Hotel Bethesda
    • Place of Presentation
      Washington DC, Invited talk
    • Year and Date
      2012-08-03
  • [Presentation] TSFZ法によるBi-2223単結晶の育成と評価2011

    • Author(s)
      足立伸太郎, 臼井友洋, 橋本雄三, 藤原 大樹, 渡辺孝夫, 西嵜照和, 小林典男, 山田和芳,藤井武則
    • Organizer
      日本物理学会
    • Place of Presentation
      富山大学
    • Year and Date
      2011-09-22

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Published: 2015-06-25  

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