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Title: Effective action for strongly correlated electron systems
Authors: Ferraz Filho, Álvaro
Kochetov, E. A.
Keywords: t–J model of strongly correlated electrons;su(2|1) coherent-state path integral
Issue Date: 21-Dec-2011
Publisher: Elsevier
Citation: FERRAZ FILHO, Alvaro; KOCHETOV, E. A. Effective action for strongly correlated electron systems. Nuclear Physics B, [s. l.], v. 853, n. 3, p. 710-738, dez. 2011. ISSN 0550-3213. DOI Disponível em: Acesso em:25 maio 2020.
Portuguese Abstract: The su(2|1) coherent-state path-integral representation of the partition function of the t–J model of strongly correlated electrons is derived at finite doping. The emergent effective action is compared to the one proposed earlier on phenomenological grounds by Shankar to describe holes in an antiferromagnet [R. Shankar, Nucl. Phys. B 330 (1990) 433]. The t–J model effective action is found to have an important “extra” factor with no analogue in Shankar’s action. It represents the local constraint of no double electron occupancy and reflects the rearrangement of the underlying phase-space manifold due to the presence of strong electron correlation. This important ingredient is shown to be essential to describe the physics of strongly correlated electron systems.
ISSN: 0550-3213 (online)
Appears in Collections:CCET - DFTE - Artigos publicados em periódicos

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