Superconductivity in the two-dimensional t-J model
Strongly Correlated Electrons
2009-11-07 v1 Superconductivity
Abstract
Using computational techniques, it is shown that pairing is a robust property of hole doped antiferromagnetic (AF) insulators. In one dimension (1D) and for two-leg ladder systems, a BCS-like variational wave function with long-bond spin-singlets and a Jastrow factor provides an accurate representation of the ground state of the t-J model, even though strong quantum fluctuations destroy the off-diagonal superconducting (SC) long-range order in this case. However, in two dimensions (2D) it is argued -- and numerically confirmed using several techniques, especially quantum Monte Carlo (QMC) -- that quantum fluctuations are not strong enough to suppress superconductivity.
Cite
@article{arxiv.cond-mat/0110460,
title = {Superconductivity in the two-dimensional t-J model},
author = {S. Sorella and G. B. Martins and F. Becca and C. Gazza and L. Capriotti and A. Parola and E. Dagotto},
journal= {arXiv preprint arXiv:cond-mat/0110460},
year = {2009}
}
Comments
4 pages, 5 figures