Indications of d_{x² - y²} Superconductivity in the Two Dimensional t-J Model

1992/12/07 by Elbio Dagotto, J. Riera, Jose Riera · 6 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat

paper · pdf · doi:10.1103/physrevlett.70.682

13 pages (figures not included), FSU-MARTECH-92-05

arxiv created 1992/12/07 · openalex publication_date 1993/02/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Superconducting correlations in the two dimensional \rm t-J model at zero temperature are evaluated using numerical techniques. At the fermionic density ⟨ n ⟩ ∼ 1/2, strong signals of \dx2y2 superconductivity were observed in the ground state. These conclusions are based on a study of static pairing correlations, the Meissner effect, flux quantization, and other indicators of superconductivity. It is argued that these results can be explained using a spin dimer ``liquid'' state. A phase diagram of the two dimensional \rm t-J model is presented.

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• Intrinsic Josephson Effect in the Layered Two-Dimensional t-J Model
• Development of Superconducting Correlation at Low Temperatures in the Two-dimensionalt–JModel
• Phase separation and three-site hopping in the two-dimensional t-J model