Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field
The pseudospin-electron model with a direct interaction between pseudospins and with transverse field is considered. In the absence of electron transfer, the equilibrium states of the model are studied in the mean field approximation. In the µ = const regime, two types of the first order phase tran...
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| Datum: | 2000 |
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| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Інститут фізики конденсованих систем НАН України
2000
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| Schriftenreihe: | Condensed Matter Physics |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/120982 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field / Yu.I. Dublenych // Condensed Matter Physics. — 2000. — Т. 3, № 4(24). — С. 815-825. — Бібліогр.: 8 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | The pseudospin-electron model with a direct interaction between pseudospins and with transverse field is considered. In the absence of electron
transfer, the equilibrium states of the model are studied in the mean field
approximation. In the µ = const regime, two types of the first order phase
transitions (with jumps of the mean values of pseudospins and average
electron concentration) are revealed. At T → 0 , phase transitions of the
first type disappear, on increasing the transverse field, while those of the
second type persist at any large value of the field. The phase transitions of
the second type are caused by simultaneous effect of pseudospin-electron
interaction and transverse field. It is also shown that in the n = const
regime at zero temperature, the phase separation occurs at all values of a
longitudinal field h . |
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