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29 March 2024
 
  » arxiv » cond-mat/9212031

 Article overview


Spin Gap and Superconductivity in the One-Dimensional t-J Model with Coulomb Repulsion
M.Troyer ; H. Tsunetsugu ; T.M. Rice ; J. Riera ; E. Dagotto ;
Date 23 Dec 1992
Subject cond-mat
AbstractThe 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.
Source arXiv, cond-mat/9212031
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