Superconducting symmetry of three-dimensional t-J model on simple cubic lattice

2009/02/09 by Huai-Xiang Huang, Huang, Huai-Xiang, YouQuan Li +1
Physics and Astronomy · #FOS: Physical sciences #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.0902.1362

4 pages, 4 figures

arxiv created 2009/02/09 · arxiv updated 2009/12/01

Abstract

Motivated by the finding of nearly isotropic superconductivity in (Ba,K)Fe₂As₂, we use renormalized mean field theory to investigated the t-J model on three-dimensional simple cubic lattice. A tunable anisotropic parameter is introduced to dictate the coupling on z direction. The symmetry of the superconducting order is studied in detail. Calculation shows that for the isotropic case, pairing parameters on the three perpendicular directions have 2/3π phase shift to each other. However, when the interaction on z direction is suppressed, the corresponding amplitude of the pairing parameter decreases rapidly, furthermore, two-dimensional d-wave state pairing is favored when the anisotropic rate less than 0.75.

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