Physics – Condensed Matter
Scientific paper
1994-03-17
Physics
Condensed Matter
12 pages, uuencoded Postscript
Scientific paper
10.1103/PhysRevB.50.3495
We contrast the effects of non-magnetic impurities on the properties of superconductors having a \dw\ order parameter, and a highly anisotropic s-wave (ASW) gap with the same nodal structure. The non-vanishing, impurity induced, off-diagonal self-energy in the ASW state is shown to gap out the low energy excitations present in the clean system, leading to a qualitatively different impurity response of the single particle density of states compared to the \dw\ state. We discuss how this behaviour can be employed to distinguish one state from the other by an analysis of high-resolution angle-resolved photoemission spectra.
Fehrenbacher Roland
Norman Michael R.
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