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Temperature Dependence of the Electrical Conductivity of the Periodic Anderson Model
Author(s) -
Elk K.
Publication year - 1982
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221120237
Subject(s) - condensed matter physics , electrical resistivity and conductivity , anderson impurity model , scattering , conductivity , kubo formula , electron , physics , materials science , thermodynamics , quantum mechanics
The temperature dependence of the electrical conductivity σ of the periodic Anderson model is investigated using a modified version of the model of Chen, Weisz, and Sher, describing the electron‐phonon scattering by a temperature dependent stochastic potential. The correlation term of the Anderson model is decoupled in the framework of the alloy analogy approximation taking into account strong electron‐electron interaction. Then the electrical conductivity can be obtained using the Kubo‐Greenwood formula. By numerical methods the density of states and the temperature dependence of σ are calculated. For σ( T ) a pronounced minimum is obtained at low temperatures T , whereas at higher temperatures σ increases with T .