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2010 Fiscal Year Final Research Report

Clarifying superconducting gap symmetry and ordered states in the layered nitride superconductors

Research Project

  • PDF
Project/Area Number 21840008
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Condensed matter physics II
Research InstitutionTohoku University

Principal Investigator

KASAHARA Yuichi  Tohoku University, 大学院・工学系研究科, 助教 (10511941)

Project Period (FY) 2009 – 2010
Keywords層状窒化物超伝導体 / 超伝導対称性
Research Abstract

Aiming at detailed studies of layered nitride superconductors using the single crystals, the synthesis of the crystals that have enough size for the experiments was found to be very difficult. Then we changed the plan, and developed a heat capacity cell for air-sensitive materials that makes systematic heat capacity measurements available, even using polycrystalline specimens. Using this method, we found a contribution of magnetic fluctuations to realize superconductivity, similar to high-transition temperature cuprate superconductors. The developed method can be useful in other material systems with air-sensitivity. Furthermore, we succeeded in developing a new method for searching electric-field-induced superconductivity.

  • Research Products

    (12 results)

All 2011 2010 2009 Other

All Journal Article (6 results) (of which Peer Reviewed: 5 results) Presentation (5 results) Remarks (1 results)

  • [Journal Article] Doping Variation of Optical Properties in ZrNCl Superconductors2011

    • Author(s)
      高野琢、笠原裕一、小口多美夫、長谷泉、田口康二郎、岩佐義宏
    • Journal Title

      Journal of the Physical Society of Japan 第80巻

      Pages: 023702-1-3

    • Peer Reviewed
  • [Journal Article] Electric-field-induced superconductivity detected by magnetization measurements of an electric-double-layer capacitor2011

    • Author(s)
      笠原裕一、西島崇裕、佐藤達哉、竹内裕紀、袁洪涛、叶劍挺、下谷秀和、岩佐義宏
    • Journal Title

      Journal of the Physical Society of Japan 第80巻

      Pages: 023708-1-4

    • Peer Reviewed
  • [Journal Article] Anisotropic superconducting order parameter in Li-intercalated layered superconductor LixZrNCl2011

    • Author(s)
      平石正俊、門野良典、宮崎正範、竹内聡史、田口康二郎、笠原裕一、高野琢、岸梅工、岩佐義宏
    • Journal Title

      Physical Review B 81

      Pages: 014525-1-4

  • [Journal Article] Liquid-gated interface superconductivity on an atomically flat film2011

    • Author(s)
      叶劍挺、井上誠之、小林克樹、笠原裕一、袁洪涛、下谷秀和、岩佐義宏
    • Journal Title

      Nature Materials 9

      Pages: 125-128

    • Peer Reviewed
  • [Journal Article] Enhancement of Pairing Interaction and Magnetic Fluctuations toward a Band Insulator in an Electron-Doped LixZrNCl Superconductor2010

    • Author(s)
      笠原裕一、岸梅工、高野琢、小林克樹、松岡英一、小野寺英也、黒木和彦、田口康二郎、岩佐義宏
    • Journal Title

      Physical Review Letters 103

      Pages: 077004-1-3

    • Peer Reviewed
  • [Journal Article] Superconductivity in molecule-intercalated LixZrNCl with variable interlayer spacing

    • Author(s)
      笠原裕一、岸梅工、小林克樹、田口康二郎、岩佐義宏
    • Journal Title

      Physical Review B 82

      Pages: 054504-1-6

    • Peer Reviewed
  • [Presentation] アルカリドープフラーレンA3C60の比熱2011

    • Author(s)
      笠原裕一,竹内裕紀,Kosmas Prassides,岩佐義宏
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学(新潟大学)
    • Year and Date
      2011-03-26
  • [Presentation] 電場によって誘起される超伝導状態とその場磁化測定2010

    • Author(s)
      笠原裕一、叶劍挺、袁洪涛、下谷秀和、岩佐義宏
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      大阪府立大学 中百舌鳥キャンパス(大阪府)
    • Year and Date
      2010-09-24
  • [Presentation] 嫌気性物質の比熱測定:電子ドープHfNCl超伝導体およびCs3C602010

    • Author(s)
      笠原裕一、小林克樹、田口康二郎、岩佐義宏
    • Organizer
      日本物理学会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-23
  • [Presentation] LixHfNClにおける比熱測定2009

    • Author(s)
      笠原裕一、小林克樹、高野琢、田口康二郎、岩佐義宏
    • Organizer
      日本物理学会
    • Place of Presentation
      熊本
    • Year and Date
      2009-09-27
  • [Presentation] Thermodynamic Measurements of LixZrNCl : Enhancement of Pairing and Magnetic Fluctuations in a Doped Band Insulator2009

    • Author(s)
      笠原裕一、岸梅工、高野琢、小林克樹、松岡英一、小野寺英一、黒木和彦、田口康二郎、岩佐義宏
    • Organizer
      9th international conference on material and mechanism of superconductivity
    • Place of Presentation
      東京、新宿
    • Year and Date
      2009-09-09
  • [Remarks] ホームページ等

    • URL

      http://iwasa.t.u-tokyo.ac.jp/kasahara/kasahara.html

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Published: 2012-01-26   Modified: 2016-04-21  

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