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Quasiparticle Resonant States Induced by a Unitary Impurity in a d-Wave Superconductor | Jian-Xin Zhu
; T. K. Lee
; C. S. Ting
; Chia-Ren Hu
; | Date: |
24 Sep 1999 | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | 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. | Source: | arXiv, cond-mat/9909363 | Services: | Forum | Review | PDF | Favorites |
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