Quasiparticle Properties around a Nonmagnetic Impurity in the Superconducting State of the Two-Dimensionalt-JModel
Hiroki Tsuchiura, Yukio Tanaka, Masao Ogata +1 more
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.
arXiv:cond-mat/9906022•Journal of the Physical Society of Japan•Aug 15, 1999•41 citations