Band electron spectrum and thermodynamic properties of the pseudospin-electron model with tunneling splitting of levels

• Опубліковано в: : Condensed Matter Physics
• Дата: 2006
• Автори: Farenyuk, O.Ya., Shvaika, A.M.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Інститут фізики конденсованих систем НАН України 2006
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/121307
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Band electron spectrum and thermodynamic properties of the pseudospin-electron model with tunneling splitting of levels / O.Ya. Farenyuk, A.M. Shvaika // Condensed Matter Physics. — 2006. — Т. 9, № 1(45). — С. 135–144. — Бібліогр.: 30 назв. — англ.

The pseudospin-electron model with tunneling splitting of levels is considered. Generalization of dynamic
 mean-field method for systems with correlated hopping was applied to the investigation of the model. Electron
 spectra, electron concentrations, average values of pseudospins and grand canonical potential were
 calculated within the alloy-analogy approximation. Electron spectrum and dependencies of the electron concentrations
 on chemical potential were obtained. It was shown that in the alloy-analogy approximation, the
 model possesses the first order phase transition to ferromagnetic state with the change of chemical potential
 and the second order phase transition with the change of temperature.