Exact thermodynamics of an Extended Hubbard Model of single and paired carriers

Item Type: Article
MIUR type: Article > Journal article
Title: Exact thermodynamics of an Extended Hubbard Model of single and paired carriers
Authors string: Dolcini F., Montorsi A.
University authors:
Journal or Publication Title: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS
Referee type: Not specified type
Publisher: APS American Physical Society
Volume: 65
Number: 15
Page Range: 155105-1-155105-13
Number of Pages: 13
ISSN: 1098-0121
Abstract: By exploiting the technique of Sutherland's species, introduced in Phys. Rev. B 63, 121103, we derive the exact spectrum and partition function of a one-dimensional extended Hubbard model. The model describes a competition between dynamics of single carriers and short-radius pairs, as a function of on-site Coulomb repulsion (U) and filling (ρ). We provide the temperature dependence of the chemical potential, compressibility, local magnetic moment, and specific heat. In particular the latter turns out to exhibit two peaks, both related to "charge" degrees of freedom. Their origin and behavior are analyzed in terms of kinetic and potential energy, both across the metal-insulator transition point and in the strong-coupling regime
Date: 2002
Status: Published
Language of publication: English
Uncontrolled Keywords:
Departments (original): DIFIS - Physics
Departments: DISAT - Department of Applied Science and Technology
Related URLs:
Subjects: Area 02 - Scienze fisiche > FISICA TEORICA, MODELLI E METODI MATEMATICI
Date Deposited: 05 Feb 2010 09:02
Last Modified: 28 Oct 2014 08:35
Id Number (DOI): 10.1103/PhysRevB.65.155105
Permalink: http://porto.polito.it/id/eprint/2303633
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