Stripes and superconducting pairing in the t-J model with Coulomb interactions

Details Stripes and superconducting pairing in the t-J model with Coulomb interactions Stripes and superconducting pairing in the t-J model with Coulomb interactions

2000-12-15

arxiv.org/abs/cond-mat/0012293v7

Phys. Rev. B 65, 134503 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

Appendix included

Scientific paper

10.1103/PhysRevB.65.134503

We 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.

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