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Delocalization of two-particle ring near the Fermi level of 2d Anderson model

  • J. Lages
  • D.L. Shepelyansky

Abstract:

We study analytically and numerically the problem of two particles with a long range attractive interaction on a two-dimensional (2d) lattice with disorder. It is shown that below some critical disorder the interaction creates delocalized coupled states near the Fermi level. These states appear inside well localized noninteracting phase and have a form of two-particle ring which diffusively propagates over the lattice.

PACS. 72.15.Rn Localization effects (Anderson or weak localization) – 71.30.+h Metal-insulator transitions and other electronic transitions – 74.20.-z Theories and models of superconducting state – 05.45.Mt Semiclassical chaos (“quantum chaos") 

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Copyright information

© EDP Sciences, Springer-Verlag 2001

Authors and Affiliations

  • J. Lages
    • 1
  • D.L. Shepelyansky
    • 1
  1. 1.Laboratoire de Physique Quantique, Université Paul Sabatier, 31062 Toulouse Cedex 4, FranceFR

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