Thermodynamics of Pseudospin-Electron Model in the U=0 Limit

• Authors: I. Stasyuk , A. Shvaika , K. Tabunshchyk
• Languages of publication: EN

Abstracts

EN

Analytical consideration of a pseudospin-electron model in the absence of electron correlations is presented. Pseudospin and electron number mean values, thermodynamic potential, pair correlation functions are obtained in the same self-consistent approximation. The possibility of either first or second order phase transitions between different uniform phases (bistability) as well as between the uniform and the chessboard one is shown. In the regime n=const, an instability with respect to phase separation can take place.

Keywords

EN

71.10.Fd; 71.38.+i; 77.80.Bh; 63.20.Ry

Discipline

• 63.20.Ry: Anharmonic lattice modes
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 3
• Pages: 411-414

Dates

published

2000-03

Contributors

author

I. Stasyuk

• Institute for Condensed Matter Physics, National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 290011 Lviv, Ukraine

author

A. Shvaika

• Institute for Condensed Matter Physics, National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 290011 Lviv, Ukraine

author

K. Tabunshchyk

• Institute for Condensed Matter Physics, National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 290011 Lviv, Ukraine

Identifiers

DOI

10.12693/APhysPolA.97.411