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A Self‐Consistent Cluster Approximation for the Disordered Hubbard Model
Author(s) -
Löser 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.2220730115
Subject(s) - hubbard model , hamiltonian (control theory) , cluster (spacecraft) , condensed matter physics , physics , electronic correlation , self consistent , coupled cluster , coupling (piping) , coherent potential approximation , electronic structure , statistical physics , electron , quantum mechanics , materials science , quantum electrodynamics , mathematics , superconductivity , molecule , mathematical optimization , computer science , programming language , metallurgy
The influence of disorder on electronic systems with intra‐atomic electron correlation is considered within a self‐consistent cluster approach. The disorder is represented by random site energies and hopping integrals in the Hubbard Hamiltonian. Configurational averaged properties of these disordered systems like reservoir coupling, local magnetic moments, and free energy per site are calculated for zero temperature and related to those in the ordered case.