Quasiparticle resonant states induced by a unitary impurity in ad-wave superconductor

1999/09/30 by Jian-Xin Zhu, Jian‐Xin Zhu, T. K. Lee +2 · 2 citations
Physics and Astronomy · #Advanced Chemical Physics Studies #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.61.8667

4 pages, 2 postscript figures, title changed and references added

arxiv created 2000/01/03 · openalex publication_date 2000/04/01 · arxiv updated 2009/11/30 · openalex created_date 2022/05/12 · openalex updated_date 2026/07/28

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\ensuremath-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 that (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 \ensuremathξ₀; (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\ensuremathξ₀.

Citations

• Theory of dirty superconductors

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