Superconductivity in the cuprates

1994/06/30 by C. D. Batista, A. A. Aligia, Batista, C. D. +1
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Theoretical and Computational Physics #cond-mat

paper · pdf · doi:10.48550/arxiv.cond-mat/9406121

9 pages, typeset in LATEX, CNEA_CAB 3328. 5 figures available upon request at [email protected]

arxiv created 1994/06/30 · arxiv updated 2009/11/30

Abstract

We evaluate numerically several superconducting correlation functions in a generalized t-J model derived for hole-doped CuO₂ planes. The model includes a three-site term t'' similar to that obtained in the large U limit of the Hubbard model but of opposite sign for realistic O-O hopping. For realistic parameters we obtain strong evidence of superconductivity of predominantly d_x²-y² character. The ground state has a large overlap with a very simple resonating-valence-bond wave function with off-diagonal long-range order. This function reproduces the main features of the magnetic and superconducting correlation functions.

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