Resonant states and order-parameter suppression near point-like impurities in d-wave superconductors

URN to cite this document:: urn:nbn:de:bvb:355-epub-18557
DOI to cite this document:: 10.5283/epub.1855

Shnirman, A. ; Adagideli, Inanc ; Goldbart, P. ; Yazdani, A.

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Date of publication of this fulltext: 05 Aug 2009 13:33

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Abstract

We examine the role of order-parameter suppression in the development of low-energy peaks (i.e., resonances) in the tunneling density of states near a non-magnetic impurity in a d-wave superconductor. Without order-parameter suppression, the zero-energy resonance appears only in the unitary (i.e., strong impurity) limit. However, suppression makes the resonance appear even when the impurity is ...