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29 March 2024
 
  » arxiv » cond-mat/0012293

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Stripes and superconducting pairing in the t-J model with Coulomb interactions
E. Arrigoni ; A. P. Harju ; W. Hanke ; B. Brendel ; S.A. Kivelson ;
Date 15 Dec 2000
Journal Phys. Rev. B 65, 134503 (2002)
Subject Strongly Correlated Electrons; Superconductivity | cond-mat.str-el cond-mat.supr-con
AffiliationITP Wuerzburg), S.A. Kivelson (UCLA
AbstractWe study the competition between long- and short-range interactions among charge carriers in strongly-correlated electronic systems employing a new method which combines the density-matrix renormalization-group technique with a self-consistent treatment of the long-range interactions. We apply the method to an extended t-J model which exhibits ``stripe’’ order. The Coulomb interactions, while not destroying stripes, induce large transverse stripe fluctuations with associated charge delocalization. This leads to a substantial Coulomb-repulsion-induced {it enhancement} of long-range superconducting pair-field correlations.
Source arXiv, cond-mat/0012293
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