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Nonlinear conductivity for mesoscopic systems

Author

Listed:
  • Qiao, Bi
  • Ruda, Harry E.
  • Xianghua, Zeng

Abstract

A generalized Kubo formula for a mesoscopic system is derived describing the conductivity, subject to an (not weak) external electric field, and shown to be expressible in the Landauer–Büttiker form. Using this approach the electrical conductivity of a quantum dot point-contact was expressed as k(2e2/h), where k represents the strength of the mutual interactions. The conditions k<1 and k>1, correspond to “repulsive” and “attractive” interactions with an external electric field, respectively, consistent with recent experimental data.

Suggested Citation

  • Qiao, Bi & Ruda, Harry E. & Xianghua, Zeng, 2002. "Nonlinear conductivity for mesoscopic systems," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 311(3), pages 429-442.
    • Handle: RePEc:eee:phsmap:v:311:y:2002:i:3:p:429-442
    DOI: 10.1016/S0378-4371(02)00811-7
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