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On the mean-field theory of the metal-insulator phase transition

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  • Brankov, J.G.
  • Pesheva, N.Ch.

Abstract

Two mean-field models describing the metal-insulator phase transition are studied. In the model due to Keldysh and Kopaev (1964) different effective masses in the valence and conduction bands are considered and in the model due to Mattis and Langer (1970) the exact s.c. and b.c.c. densities of states are taken into account. It is shown that these modifications do not change the qualitative features of the phase diagrams. In each case a special attention is paid to the domain of the degenerate semiconductor, which has been of primary interest in many attempts to explain conjectured enhancement of superconductivity in systems undergoing dielectric transition.

Suggested Citation

  • Brankov, J.G. & Pesheva, N.Ch., 1985. "On the mean-field theory of the metal-insulator phase transition," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 129(2), pages 423-437.
    • Handle: RePEc:eee:phsmap:v:129:y:1985:i:2:p:423-437
    DOI: 10.1016/0378-4371(85)90178-5
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