Quasiparticle Resonant States Induced by a Unitary Impurity in a d-Wave Superconductor
Superconductivity
2009-10-31 v2 Strongly Correlated Electrons
Abstract
The quasiparticle resonant states around a single nonmagnetic impurity with unitary scattering in a d-wave superconductor is studied by solving the Bogoliubov-de Gennes equations based on a t-J model. Both the spatial variation of the order parameter and the local density of states (LDOS) around the impurity have been investigated. We find: (i) A particle-hole symmetric system has a single symmetric zero-energy peak in the LDOS regardless of the size of the superconducting coherence length \xi_0; (ii) For the particle-hole asymmetric case, an asymmetric splitting of the zero-energy peak is intrinsic to a system with a small value of k_{F}\xi_0.
Cite
@article{arxiv.cond-mat/9909363,
title = {Quasiparticle Resonant States Induced by a Unitary Impurity in a d-Wave Superconductor},
author = {Jian-Xin Zhu and T. K. Lee and C. S. Ting and Chia-Ren Hu},
journal= {arXiv preprint arXiv:cond-mat/9909363},
year = {2009}
}
Comments
4 pages, 2 postscript figures, title changed and references added