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Charge Order in the Spinless Fermion Model
Author(s) -
Lorenz B.
Publication year - 1980
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.2221010131
Subject(s) - fermion , coulomb , phase diagram , physics , charge (physics) , condensed matter physics , ground state , order (exchange) , phase transition , cluster (spacecraft) , quantum mechanics , statistical physics , phase (matter) , electron , finance , computer science , economics , programming language
Abstract The spinless fermion model which takes into account the transfer and the nearest neighbour Coulomb interaction of fermions is treated in a two site cluster approximation. For the linear chain the results are compared with the exact solution for the ground state and with other approximations. In two‐and three‐dimensional lattices the order–disorder transition is considered in dependence on the transfer energy and the phase diagram is calculated. The validity of the theory for the description of the order–disorder transition in superionic conductors is discussed.