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Effect of Thermal Fluctuations on the Electronic Density of States in Disordered Binary Alloys. Numerical Results of CPA Model Calculations
Author(s) -
Kolley E.,
Kolley W.
Publication year - 1976
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.2220750236
Subject(s) - randomness , condensed matter physics , density of states , diagonal , binary number , coherent potential approximation , phonon , scattering , thermal , tight binding , physics , electronic structure , limit (mathematics) , impurity , materials science , quantum mechanics , thermodynamics , mathematics , mathematical analysis , statistics , geometry , arithmetic
An extended coherent potential approximation is applied to electron‐phonon interaction in disordered binary alloys. Numerical calculations are performed for a stochastic tight‐binding model including off‐diagonal randomness in the additive limit and results for the temperature dependence of the electronic self‐energy and density of states are presented. The density of states can display in the minority band fine structure caused by combined impurity and electron‐phonon scattering. The role of the phonon‐modulated hopping integrals is discussed.