title: Superconductivity in the two-dimensional t-J model.
abstract: Using computational techniques, it is shown that pairing is a robust property of hole-doped antiferromagnetic insulators. In one dimension 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 long-range order in this case. However, in two dimensions it is argued-and numerically confirmed using several techniques, especially quantum Monte Carlo-that quantum fluctuations are not strong enough to suppress superconductivity.
authors.affiliation: Istituto Nazionale per la Fisica della Materia, and SISSA, I-34014 Trieste, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Sorella
authors.forename: G B
authors.initials: GB
authors.lastname: Martins
authors.forename: F
authors.initials: F
authors.lastname: Becca
authors.forename: C
authors.initials: C
authors.lastname: Gazza
authors.forename: L
authors.initials: L
authors.lastname: Capriotti
authors.forename: A
authors.initials: A
authors.lastname: Parola
authors.forename: E
authors.initials: E
authors.lastname: Dagotto