Magnetic and thermal properties of a one-dimensional spin-1 model
We study the one-dimensional S = 1 Blume-Emery-Grif ths model. Upon transforming the spin model into an equivalent fermionic model, we provide the exact solution within the Green's function and equations of motion formalism. We show that the relevant response functions as well as thermodynami...
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| Datum: | 2008 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Інститут фізики конденсованих систем НАН України
2008
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| Schriftenreihe: | Condensed Matter Physics |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/119381 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Magnetic and thermal properties of a one-dimensional spin-1 model / F. Mancini, F.P. Mancini // Condensed Matter Physics. — 2008. — Т. 11, № 3(55). — С. 543-553. — Бібліогр.: 16 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | We study the one-dimensional S = 1 Blume-Emery-Grif ths model. Upon transforming the spin model into
an equivalent fermionic model, we provide the exact solution within the Green's function and equations of
motion formalism. We show that the relevant response functions as well as thermodynamic quantities can
be determined, in the whole parameters space, in terms of a nite set of local correlators. Furthermore,
considering the case of an antiferromagnetic chain with single-ion anisotropy in the presence of an external
magnetic eld, we nd three plateaus in the magnetization curve. In the neighborhood of the endpoints of the
intermediate plateau, the speci c heat shows a double peak structure. |
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