99-02E

# 99-02E

By - Posted on 08 February 2012

UDC:
537.226.33, 537.312.62
PACS:
64.60.Cn, 63.20.Ry, 74.25.Kc

Dynamics and thermodynamics of the model with local anharmonism in the case of absence of the electron Hubbard correlation. II. The numerical research.

I.V. Stasyuk
A.M. Shvaika
K.V. Tabunshchyk.

The analysis of the thermodynamic properties of the pseudospin--electron model in the case of absence of the electron correlation is performed. It is shown that interaction between the electron and pseudospin subsystems leads in the $\mu$=const regime to the possibility of the first order phase transition at the temperature change with the jump of the pseudospin mean value $\langle S^z\rangle$ and reconstruction of the electron spectrum. In the regime $n$=const an instability with respect to the phase separation in electron subsystem can take place for certain values of the model parameters.

Year:
1999
Pages:
14