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An unexpected conducting phase in two dimensions

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  • Sarachik, M.P.
  • Kravchenko, S.V.
  • Simonian, D.
  • Pudalov, V.M.

Abstract

Within the scaling theory of localization for noninteracting electrons, all two dimensional systems are insulating in the absence of a magnetic field when examined at sufficiently large length scales, or in the limit of zero temperature. Contrary to this two-decades-old expectation, recent experiments have shown there exists a conducting phase at low temperatures for low electron (hole) densities, a regime where electron-electron interaction energies are large compared to the Fermi energy. We briefly review experiments in silicon MOSFETs that provide evidence of an apparent conductor-insulator transition in two dimensions.

Suggested Citation

  • Sarachik, M.P. & Kravchenko, S.V. & Simonian, D. & Pudalov, V.M., 1999. "An unexpected conducting phase in two dimensions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 263(1), pages 208-214.
    • Handle: RePEc:eee:phsmap:v:263:y:1999:i:1:p:208-214
    DOI: 10.1016/S0378-4371(98)00530-5
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