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Magnetism and Superfluidity in Charge-Neutral Fermi Particles in Two Dimensions

Research Project

Project/Area Number 15H03684
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionThe University of Tokyo

Principal Investigator

FUKUYAMA Hiroshi  東京大学, 大学院理学系研究科(理学部), 教授 (00181298)

Co-Investigator(Kenkyū-buntansha) 村川 智  東京大学, 低温センター, 准教授 (90432004)
Research Collaborator NAKAMURA Sachiko  
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥13,780,000 (Direct Cost: ¥10,600,000、Indirect Cost: ¥3,180,000)
Fiscal Year 2017: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2016: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Keywords量子スピン液体 / 量子液晶 / 2次元フェルミ系 / 異方的超流動 / 単原子層 / マヨラナ粒子 / 固体ヘリウム
Outline of Final Research Achievements

By measuring specific heat of helium 3 (3He: nuclear spin 1/2) monolayers physisorbed on graphite surfaces down to millikelvin temperatures, we obtained the following new results: (1) There exists quantum liquid crystal in between quantum solid and quantum liquid. The possible structure of the quantum liquid crystal state in 3He monolayers is quantum hexatic phase. The quantum liquid crystallinity would result in the emergence of the known gapless quantum spin liquid (QSL) state in this system. (2) A new 3He commensurate phase was discovered in 3He monolayer on graphite preplated with a bilayer of HD, where a new class of QSL state with curious fractional powers of temperature dependences of specific heat and magnetic susceptibility is realized.

Academic Significance and Societal Importance of the Research Achievements

多数のヘリウム3原子を固体表面ごく近傍の2次元空間に閉じ込めて超低温に冷却すると、これまで知られていないさまざまな集団的な振る舞いを見せる。本研究では、絶対零度でも一定の流動性と結晶性を併せもつ「量子液晶」という物質相が存在すること、それが他のさまざまな物質系で議論されている「量子スピン液体」という新しい磁性状態の要因である可能性を示した。また、固体表面の周期的な吸着ポテンシャルの中で、ヘリウム3原子が規則的に並ぶ相が見つかり、そこではまた全く異なる量子スピン液体状態が実現していることも見出した。これらの新奇磁性は量子計算機の新しい基礎原理にもつながる。

Report

(4 results)
  • 2018 Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (33 results)

All 2019 2018 2017 2016 2015 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (26 results) (of which Int'l Joint Research: 13 results,  Invited: 9 results) Remarks (1 results)

  • [Journal Article] The Role of Substrate Roughness in Superfluid Film Flow Velocity2019

    • Author(s)
      Usami Jun、Kato Nobuyuki、Matsui Tomohiro、Fukuyama Hiroshi
    • Journal Title

      Journal of Low Temperature Physics

      Volume: 印刷中 Issue: 1-2 Pages: 52-59

    • DOI

      10.1007/s10909-018-02119-w

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 4He permeation and H2O uptake of cyanate ester resins ? an alternative to commonly used epoxy resins at low temperature2018

    • Author(s)
      Nakamura Sachiko、Fujii Takenori、Matsukawa Shoji、Katagiri Masayuki、Fukuyama Hiroshi
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 969 Pages: 012080-012080

    • DOI

      10.1088/1742-6596/969/1/012080

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characterization of Pyrolytic Graphite Sheet: A New Type of Adsorption Substrate for Studies of Superfluid Thin Films2018

    • Author(s)
      Nakamura Sachiko、Miyafuji Daisuke、Toda Ryo、Matsui Tomohiro、Fukuyama Hiroshi
    • Journal Title

      Journal of Low Temperature Physics

      Volume: 192 Issue: 5-6 Pages: 330-345

    • DOI

      10.1007/s10909-018-1983-3

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Specific heat, thermal conductivity, and magnetic susceptibility of cyanate ester resins ? An alternative to commonly used epoxy resins2018

    • Author(s)
      Nakamura Sachiko、Fujii Takenori、Matsukawa Shoji、Katagiri Masayuki、Fukuyama Hiroshi
    • Journal Title

      Cryogenics

      Volume: 95 Pages: 76-81

    • DOI

      10.1016/j.cryogenics.2018.09.001

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Low temperature transport properties of pyrolytic graphite sheet2017

    • Author(s)
      Nakamura Sachiko、Miyafuji Daisuke、Fujii Takenori、Matsui Tomohiro、Fukuyama Hiroshi
    • Journal Title

      Cryogenics

      Volume: 86 Pages: 118-122

    • DOI

      10.1016/j.cryogenics.2017.08.004

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Possible quantum liquid crystal phases of helium monolayers2016

    • Author(s)
      S. Nakamura, K. Matsui, T. Matsui, and H. Fukuyama
    • Journal Title

      Physical Review B

      Volume: 94 Issue: 18

    • DOI

      10.1103/physrevb.94.180501

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 単原子層ヘリウム3で見つかった2種類の量子スピン液体状態2019

    • Author(s)
      福山寛
    • Organizer
      日本物理学会第 74回年年次大会
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quantum Phase Diagram of 3He Monolayer on Hydrogen Plated Graphite2018

    • Author(s)
      Masahiro Kamada, Ryuji Nakamura, Katsuyoshi Ogawa, Tomohiro Matsui, and Hiroshi Fukuyama
    • Organizer
      International Symposium on Quantum Fluids and Solids (QFS2018)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The Role of Substrate Roughness on the Superfluid Film Flow Rate of 4He2018

    • Author(s)
      Jun Usami, Tomohiro Matsui, and Hiroshi Fukuyama
    • Organizer
      International Symposium on Quantum Fluids and Solids (QFS2018)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] New Quantum Spin Liquids in 3He Monolayer on Hydrogen Plated Graphite2018

    • Author(s)
      Masahiro Kamada, Ryuji Nakamura, Katsuyoshi Ogawa, Tomohiro Matsui, and Hiroshi Fukuyama
    • Organizer
      International Symposium on Quantum Fluids and Solids (QFS2018)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Novel quantum phases of helium confined in two dimensions from quantum liquid-crystal to spin-liquid2018

    • Author(s)
      Hiroshi Fukuyama
    • Organizer
      12th International Conference on Cryocrystals and Quantum Crystals
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 単原子層ヘリウム 3 の量子液晶相と量子スピン液体状態2018

    • Author(s)
      福山寛
    • Organizer
      物性研究所短期研究会「量子多体効果が生み出す液晶的電子状態」
    • Related Report
      2017 Annual Research Report
  • [Presentation] 単原子層ヘリウムの新奇量子相~量子液晶、 超結晶、マヨラナ磁気素励起~2017

    • Author(s)
      福山寛
    • Organizer
      日本物理学会第72回年次大会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 単原子層量子液晶ヘリウム4 における超流動性の検証実験2017

    • Author(s)
      中村祥子、戸田亮、青木隆明、鈴木基己、福山寛
    • Organizer
      日本物理学会第72回年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Recent Progress in Studies of Emer- gent Quantum Phases of 2D Helium Systems2017

    • Author(s)
      Hiroshi Fukuyama, Masahiro Kamada, Sachiko Nakamura
    • Organizer
      International Conference on Ultra Low Temperature Physics (ULT 2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Self-Condensed Liquid Phase of Helium-3 Adsorbed on Hydrogen Preplated Graphite2017

    • Author(s)
      Masahiro Kamada, Katsuyoshi Ogawa, Ryuji Nakamura, Tomohiro Matsui, and Hiroshi Fukuyama
    • Organizer
      28th International Conference on Low Temperature Physics (LT28)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Order- Disorder Transition in 2D Quantum Systems and Its Doping Effects2017

    • Author(s)
      Sachiko Nakamura, and Hiroshi Fukuyama
    • Organizer
      28th International Conference on Low Temperature Physics (LT28)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Low temperature properties of cyanate ester resins - an alternative to commonly used epoxy resins2017

    • Author(s)
      Sachiko Nakamura, Takenori Fujii, Shouji Matsukawa, Masayuki Katagiri, and Hiroshi Fukuyama
    • Organizer
      28th International Conference on Low Temperature Physics (LT28)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 水素膜上2次元ヘリウム3の量子液体相の比熱測定2017

    • Author(s)
      小川勝之、鎌田雅博、中村龍司、松井朋裕、福山寛
    • Organizer
      日本物理学会2017 年 秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 超流動フィルムフロー速度と基板表面粗さの関係 II2017

    • Author(s)
      宇佐美潤、松井朋裕、福山寛
    • Organizer
      日本物理学会2017 年 秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 単原子層ヘリウムの新奇量子相 ~量子液晶、 超結晶、マヨラナ磁気素励起~2017

    • Author(s)
      福山寛
    • Organizer
      日本物理学会第72回年次大会
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] 単原子層量子液晶ヘリウム4における超流動性の検証実験2017

    • Author(s)
      中村祥子、戸田亮、青木隆明、鈴木基己、福山 寛
    • Organizer
      日本物理学会第72回年次大会
    • Related Report
      2016 Annual Research Report
  • [Presentation] 2次元ヘリウムの整合局在に対する同位体効果2016

    • Author(s)
      中村祥子、福山 寛
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学(宮城県・仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Annual Research Report
  • [Presentation] 水素膜上2次元ヘリウム3の量子相図2016

    • Author(s)
      中村龍司, 鎌田雅博,松井朋裕,福山 寛
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学(宮城県・仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Annual Research Report
  • [Presentation] Quantum Liquid, Solid and Liquid-crystal Phases of Helium in Two-dimensions2016

    • Author(s)
      Hiroshi Fukuyama
    • Organizer
      Exploring Extreme Forms of Matter
    • Place of Presentation
      東京大学(東京都・文京区)
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A possible quantum-liquid-crystal phase in helium monolayers adsorbed on graphite2016

    • Author(s)
      Hiroshi Fukuyama, Sachiko Nakamura, Masahiro Kamada, Ryuji Nakamura, and Tomohiro Matsui
    • Organizer
      International Conference on Quantum Fluids and Solids 2016 (QFS2016)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 2次元ヘリウムにおける量子液晶状態の可能性2016

    • Author(s)
      福山 寛、中村祥子、鎌田雅博、中村龍司、松井朋裕
    • Organizer
      日本物理学会2016年秋季大会
    • Related Report
      2016 Annual Research Report
  • [Presentation] シアネートエステル樹脂の低温物性2016

    • Author(s)
      中村祥子、藤井武則、松川将治、片桐誠之、福山 寛
    • Organizer
      日本物理学会2016年秋季大会
    • Related Report
      2016 Annual Research Report
  • [Presentation] 水素膜上2次元ヘリウム3の磁気相図2015

    • Author(s)
      鎌田雅博, 中村龍司, 松井朋裕, 福山 寛
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      関西学院大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 2次元整合固体3Heの量子スピン液体状態2015

    • Author(s)
      中村龍司, 鎌田雅博,松井朋裕,福山 寛
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      関西学院大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] New Quantum Phases of Monolayers of Helium2015

    • Author(s)
      Hiroshi Fukuyama
    • Organizer
      Physics of Interfaces and Layered Structures
    • Place of Presentation
      Stockholm, Sweden
    • Year and Date
      2015-08-24
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] New Quantum Phases of Monolayers of Helium2015

    • Author(s)
      Hiroshi Fukuyama
    • Organizer
      Grand Challenges in Quantum Fluids and Solids
    • Place of Presentation
      Buffalo, U.S.A.
    • Year and Date
      2015-08-07
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 福山研究室website

    • URL

      http://kelvin.phys.s.u-tokyo.ac.jp/index.html

    • Related Report
      2015 Annual Research Report

URL: 

Published: 2015-04-16   Modified: 2020-05-15  

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