Electron Diffusion in a Two-Dimensional Disordered Symplectic System with Electron-Phonon Interactions

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Author(s)

Abstract

The temperature dependence of the electronic diffusion coefficient in a disordered symplectic system with electron-phonon interactions is numerically calculated. Electron-phonon interactions are introduced as the modification of the electronic transfer-integrals due to lattice distortions. In the metallic region, the diffusion coefficient is found to decrease as the temperature increases. The temperature dependence involves two contributions, i.e., the dynamical and the static effects of the random modification of the transfer-integrals. The dynamical effect works as a dephasing effect which reveals itself as a decrease of the diffusion coefficient. On the other hand, the static effect acts as static disorders for the electronic motion. Similar analysis is performed also in the insulating region, and the dynamical effect is found to make the electronic motion diffusive.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 74(4), 1240-1244, 2005-04-15

    The Physical Society of Japan (JPS)

References:  23

Codes

  • NII Article ID (NAID)
    110001979518
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00319015
  • NDL Article ID
    7299678
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS 
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