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1997 Fiscal Year Final Research Report Summary

FREE SURFACE OF FERMI LIQUID

Research Project

Project/Area Number 08454090
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅱ(磁性・金属・低温)
Research InstitutionUNIVERSITY OF TOKYO

Principal Investigator

KONO Kimitoshi  UNIVERSITY OF TOKYO,INSTITUTE FOR SOLID STATE PHYSICS,ASSOCIATE PROFESSOR, 物性研究所, 助教授 (30153480)

Co-Investigator(Kenkyū-buntansha) SHIRAHAMA Keiya  UNIVERSITY OF TOKYO,INSTITUTE FOR SOLID STSTE PHYSICS,RESEARCH ASSOCIATE, 物性研究所, 助手 (70251486)
Project Period (FY) 1996 – 1997
KeywordsFermi Lquid / Liquid Helium-3 / Two-dimensional Electrons / Wigner Solid / Superfluid / Normalfluid / Quasiparticle / Plasmon
Research Abstract

We measured the conductivity of the Wigner solid on normal-and superfluid helium-3 and gave a theoretical account. The Wigner solid is a two-dimensioanlcrystal of triangular lattice, which is accompanied with dimples under each lattiec site. When the dimple moves, it scatters quasiparticles in liquid helium-a3 and feels the frictional force. With calculating this force quantitatively, one can account for the behavior of the conductivity.
When temperature is high (>100mK), the scattering mean free path between quasiparticles is so short that the liquid behaves as if a classical viscous liquid. The viscosity of the Fermi liquid increases proportional to T^2, as temperature decreases, and hence the conductivity decreases. Decreasing temperature, the mean free path incereases longer than the lattice constant of the Wigner solid, so that the conductivity becomes no more sensitive to the temperature. Going further down to lower temperature, eventually helium-3 undergoes the superfluidity transition, which casses a change in the excitation spectrum of liquid helium-3. This change can naturally interplete the experimental observation.
The present research is restricted in the B-phase of superfluid helium-3. It is necessary to extend the present work to A-phase, which has an anisotropic energy gap.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] S.Ito: "Damping of Edge Magnetoplasmons and Quantum Transport of Surface State Electrons on Liquid Helium" J.Phys.Soc.Jpn.66. 533-536 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yu.P.Monarkha: "Inelastic Quantum Magnetotransport in a Highly Correlated Two-Dimensional Electron Liquid" Phy.Rev.Lett.78. 2445-2448 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yu.P.Monarkha: "Quantum Magnetotransport in a Highly Correlated Two-Dimensional Electron Liquid on a Superfluid Helium Surface" Fiz.Nizk.Temp.23. 629-638 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yu.P.Monarkha: "Dynamic Properties of Two-Dimensional Wigner Solid on the Surface of Normal and Superfluid ^3He" J.Phys.Soc.Jpn.66. 3901-3907 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Shirahama: "Wigner Solid on the Free Surface of Superfluid ^3He" Phy.Rev.Lett.79. 4218-4221 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Shirahama: "Conductivity of the Wigner Solid on the Free Surface of Superfluid ^3He-B" J.Low Temp.Phys.110. 179-184 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yu.P.Monarkha: "Wigner Solid Dynamics on Normal and Superfluid ^3He" Physica B. to appear.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 河野 公俊: "電子が感じる超流動^3Heの液面" パリティ. 掲載予定.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K, Kono: "Two-Dimensional Electron Systems on Helium and Other Cryogenic Substrates(Ed.E.Andrei)" Kluwer Academic publisher, 393 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Ito: "Damping of Edge Magnetoplasmons and Quantum Transport of Surface State Electrons on Liquid Helium" J.Phys.Soc.Jpn.66. 533-536 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yu.P.Monarkha: "Inelastic Quantum Magnetotransport in a Highly Correlated Two-Dimensional Electron Liquid" Phys.Rev.Lett.78. 2445-2448 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yu.P.Monarkha: "Quantum Magnetotransport in a Highly Correlated Two-Dimensional Electron Liquid on a Superfluid Helium Surface" Fiz.Nizk.Temp.23. 629-638 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yu.P.Monarkha: "Dynamic Properties of the Two-Dimensional Wigner Solid on the Surface of Normal and Superfluid ^3He" J.Phys.Soc.Jpn.66. 3901-3907 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Shirahama: "Wigher Solid on the Free Surface of Superfluid ^3He" Phys.Rev.Lett.79. 4218-4221 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Shirahama: "Conductivity of the Wigner Solid on the Free Surface of Superfluid ^3He-B" J.Low Temp.Phys.110. 179-184 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yu.P.Monarakha: "Wigner Solid Dynamics on Normal and Superfluid ^3He" Physica B. (to appear.).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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