Magnetic and thermal properties of a one-dimensional spin-1 model
We study the one-dimensional S=1 Blume-Emery-Griffiths 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 q...
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Institute for Condensed Matter Physics
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Online Access: | http://dx.doi.org/10.5488/CMP.11.3.543 |
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doaj-cb434d16f23845dd8a1a27f8f1d2d2b02020-11-24T23:09:01ZengInstitute for Condensed Matter PhysicsCondensed Matter Physics1607-324X2008-09-01113543Magnetic and thermal properties of a one-dimensional spin-1 modelF.ManciniF.P.ManciniWe study the one-dimensional S=1 Blume-Emery-Griffiths 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 finite set of local correlators. Furthermore, considering the case of an antiferromagnetic chain with single-ion anisotropy in the presence of an external magnetic field, we find three plateaus in the magnetization curve. In the neighborhood of the endpoints of the intermediate plateau, the specific heat shows a double peak structure.http://dx.doi.org/10.5488/CMP.11.3.543Blume-Emery-Griffiths modelmagnetic plateauexact solution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
F.Mancini F.P.Mancini |
spellingShingle |
F.Mancini F.P.Mancini Magnetic and thermal properties of a one-dimensional spin-1 model Condensed Matter Physics Blume-Emery-Griffiths model magnetic plateau exact solution |
author_facet |
F.Mancini F.P.Mancini |
author_sort |
F.Mancini |
title |
Magnetic and thermal properties of a one-dimensional spin-1 model |
title_short |
Magnetic and thermal properties of a one-dimensional spin-1 model |
title_full |
Magnetic and thermal properties of a one-dimensional spin-1 model |
title_fullStr |
Magnetic and thermal properties of a one-dimensional spin-1 model |
title_full_unstemmed |
Magnetic and thermal properties of a one-dimensional spin-1 model |
title_sort |
magnetic and thermal properties of a one-dimensional spin-1 model |
publisher |
Institute for Condensed Matter Physics |
series |
Condensed Matter Physics |
issn |
1607-324X |
publishDate |
2008-09-01 |
description |
We study the one-dimensional S=1 Blume-Emery-Griffiths 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 finite set of local correlators. Furthermore, considering the case of an antiferromagnetic chain with single-ion anisotropy in the presence of an external magnetic field, we find three plateaus in the magnetization curve. In the neighborhood of the endpoints of the intermediate plateau, the specific heat shows a double peak structure. |
topic |
Blume-Emery-Griffiths model magnetic plateau exact solution |
url |
http://dx.doi.org/10.5488/CMP.11.3.543 |
work_keys_str_mv |
AT fmancini magneticandthermalpropertiesofaonedimensionalspin1model AT fpmancini magneticandthermalpropertiesofaonedimensionalspin1model |
_version_ |
1725611897243303936 |