Acta Physica Polonica B

Vol. 34, No. 2, February 2003, page 765

Susceptibility and Phase Transitions in the Pseudospin--Electron Model at Weak Coupling

I.V. Stasyuk, T.S. Mysakovych

The pseudospin-electron model (PEM) is considered in the case of the weak pseudospin-electron coupling. It is shown that the transition to uniform and chess-board phases occurs when the chemical potential is situated near the electron band edges and near the band centre, respectively. The incommensurate phase is realized at the intermediate values of the chemical potential.

PACS numbers: 63.20.Ry, 64.70.Kb, 71.10.Fd, 77.80.Bh

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