Spin Gap and Superconductivity in the One-Dimensional t-J Model with Coulomb Repulsion

Preprint

23 December 1992

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9212031

Abstract

The one-dimensional t-J model with density-density repulsive interactions is investigated using exact diagonalization and quantum Monte Carlo methods. A short-range repulsion pushes phase separation to larger values of J/t, and leads to a widened precursor region in which a spin gap and strengthened superconducting correlations appear. The correlation exponent is calculated. On the contrary, a long-range repulsion of $1/r$-form suppresses superconductivity in the precursor region.

Keywords

MONTE CARLO METHODS
SUPERCONDUCTIVITY
PRECURSOR REGION
RANGE REPULSION
REPULSION
SPIN GAP
COULOMB

All Related Versions

Version 1, 1992-12-23, ArXiv
Published version: Physical Review B, 48 (6), 4002.

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