Quasiparticle properties around a nonmagnetic impurity in the superconducting state of the two-dimensional t-J model

Details Quasiparticle properties around a nonmagnetic impurity in the superconducting state of the two-dimensional t-J model Quasiparticle properties around a nonmagnetic impurity in the superconducting state of the two-dimensional t-J model

1999-06-02

arxiv.org/abs/cond-mat/9906022v2

J. Phys. Soc. Jpn. 68 (1999) 2510-2513

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1143/JPSJ.68.2510

The superconducting state around a well isolated nonmagnetic impurity in the high-Tc superconductors is studied using the two-dimensional t-J model. The spatial dependence of the order parameter and the local density of states are obtained from the numerical diagonalization of the Bogoliubov-de Gennes equation derived using the Gutzwiller approximation. We find a zero-energy peak in the local density of states around the impurity. Different from the previous results on a vortex or surfaces in the t-J model, the splitting of zero-energy peak is not found. The zero-energy states corresponding to the zero-energy peak is approximately localized around the impurity.

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