• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

New mechanism for two-dimensional superconductivity of means of surface acoustic soliton

Research Project

Project/Area Number 02805001
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Applied materials
Research InstitutionHokkaido University

Principal Investigator

SAKUMA Tetsuro  Hokkaido Univ., Fac. of Eng., Professor, 工学部, 教授 (70001196)

Co-Investigator(Kenkyū-buntansha) NISHIGUCHI Norihiko  Hokkaido Univ., Fac. of Eng., Instructor, 工学部, 助手 (40175518)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1991: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1990: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsSurface Acoustic Soliton / Superconductivity / Acoustic Soliton of the KdV Type / Electric Conductivity / Thermal Conductivity / Fourier's Law / フ-リェ則 / 半導体薄膜
Research Abstract

Since the surface acoustic waves propagate along the solid surface confining their energy within one wavelengh from the surface, the lattice anharmonicity is enhanced. Also there exist some dispersive effects due to the surface structure and the anharmonicity is balanced with this dispersive effect to form the surface acoustic soliton 6f the KdV type. We formulated the theory of the surface acoustic soliton of the KdV type by considering the Love waves supported in a thin film deposited on the semi-infinite substrate.
The conduction electrons interact with the surface acoustic solitons through the electron-phonon interaction which act as a potential for the conduction electrons in a thin film. We have successfully shown that the electrons are trapped in an acoustic soliton and it gives a novel mechanism of charge transport which may be called as "quasi-superconductivity" in a thin film due to the stable motion of the charge-carrying surface acoustic solitons.
Thermal conductivity has a close relation to the electric conductivity. To obtain the Fourier's law from the first-principle, we investigated the heat conduction in low dimensional anharmonic lattice based on numerical simulation.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] T.Sakuma and N.Nishiguchi: "Theory of the surface acoustic soliton V.Approximate soliton solution of the Korteweg-de Vries type" Physical Review B. 41. 12117-12121 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Sakuma and N.Nishiguchi: "Surface Acoustic Soliton -Quantum Theoretical Approach-" Acta Physicae Superficierum. II. 9-12 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N.Nishiguchi and T.Sakuma: "Temperature-dependent thermal conductivity in low-dimensional lattices" Journal of Physics:Condens.Matter. 2. 7575-7584 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Sakuma and N.Nishiguchi: "Electron Transport by Surface Acoustic Soliton of the KdV Type" Japanese Journal of Applied Physicsd Suppl.30-1. 137-139 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N.Nishiguchi,N.Takahashi and T.Sakuma: "Thermal conductivity in one-dimensional quasiperiodic Toda lattices" Journal of Physics:Condens.Matter. 4. 1465-1473 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N.Nishiguchi,N.Takahashi and T.Sakuma: "Simulated Heat Conduction in Toda Lattices with Inhomogeneous Mass Distribution" Japanese Journal of Applied Physics Suppl.31-1. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Tetsuro Sakuma and Norihiko Nishiguchi: "Theory of the surface acoustic soliton V. Approximate soliton solution of the Korteweg-de Vries type" Physical Review B. 41, No. 17. 12117-12121 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Tetsuro Sakuma and Norihiko Nighiguchi: "Surface Acoustic Soliton -Quantum Theoretical Approach-" Acta Physical Superficierum. 2. 9-12 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Norihiko Nishiguchi and Tetsuro Sakuma: "Temperature-dependent thermal conductivity in low-dimensional lattices" Journal of Physics : Condens. Matter. 2, No. 37. 7575-7584 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Tetsuro Sakuma and Norihiko Nishiguchi: "Electron Transport by Surface Acoustic Soliton of the KdV Type" Japanese Journal of Applied Physics Supplement. 30. 137-139 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Norihiko Nishiguchi, Naoki Takahashi and Tetsuro Sakuma: "Thermal conductivity in one-dimensional quasi-periodic Toda lattices" Journal of Physics : Condens. Matter. 4, No. 6. 1465-1473 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Norihiko Nishiguchi, Naoki Takahashi and Tetsuro Sakuma: "Simulated Heat Conduction in Toda Lattices with Inhomogeneous Mass Distribution" Japanese Journal of Applied Physics Supplement. 31. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Sakuma and N.Nishiguchi: "Theory of the surface acoustic soliton V.Approximate soliton solution of the Kortewegーde Vries type" Physical Review B. 41. 12117-12121 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] T.Sakuma and N.Nishiguchi: "Surface Acoustic SolitonーQuantum Theoretical Approachー" Acta Physical Superficierum. II. 9-12 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] N.Nishiguchi and T.Sakuma: "Temperatureーdependent thermal conductivity in lowーdimensional lattices" Journal of Physics:Condens.Matter. 2. 7575-7584 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] T.Sakuma and N.Nishiguchi: "Electron Transport by Surface Acoustic Soliton of the KdV Type" Japanese Journal of Applied Physics Suppl.30ー1. 137-139 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] N.Nishiguchi,N.Takahashi and T.Sakuma: "Thermal conductivity in oneーdimensional quasiperiodic Toda lattices" Journal of Physics:Condens.Matter. 4. 1465-1473 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] N.Nishiguchi,N.Takahashi and T.Sakuma: "Simulated Heat Conduction in Toda Lattices with Inhomogeneous Mass Distribution" Japanese Journal of Applied Physics Suppl.31ー1. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tetsuro Sakuma: "Theory of the surface acoustic soliton.V.Approximate soliton solution of the KdV type" Physical Review B. 41. 12117-12121 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Norihiko Nishiguchi: "TemperatureーDependent Thermal Conductivity in LowーDimensional Lattices" J.Phys:Condensen Matters. 2. 7575-7584 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Tetsuro Sakuma: "Electron Transport by Surface Acoustic Soliton of the KdV Type" Jpn.J.Appl.Phys.Suppl.(1991)

    • Related Report
      1990 Annual Research Report

URL: 

Published: 1990-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi