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Thermoelectric transport properties in disordered systems near the Anderson transition

  • C. Villagonzalo
  • R.A. Römer
  • M. Schreiber

Abstract:

We study the thermoelectric transport properties in the three-dimensional Anderson model of localization near the metal-insulator transition (MIT). In particular, we investigate the dependence of the thermoelectric power S, the thermal conductivity K, and the Lorenz number L0 on temperature T. We first calculate the T dependence of the chemical potential μ from the number density n of electrons at the MIT using an averaged density of states obtained by diagonalization. Without any additional approximation, we determine from \(\) the behavior of S, K and L0 at low T as the MIT is approached. We find that \(\) and K decrease to zero at the MIT as \(\) and show that S does not diverge. Both S and L0 become temperature independent at the MIT and depend only on the critical behavior of the conductivity.

PACS. 61.43.-j Disordered solids [:AND:]71.30.+h Metal-insulator transitions and other electronic transitions [:AND:]72.15.Cz Electrical and thermal conduction in amorphous and liquid metals and alloys 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 1999

Authors and Affiliations

  • C. Villagonzalo
    • 1
  • R.A. Römer
    • 1
  • M. Schreiber
    • 1
  1. 1.Institut für Physik, Technische Universität, 09107 Chemnitz, GermanyDE

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