Can Impurity Effects Help to Identify the Symmetry of the Order Parameter of the Cuprates?
Abstract
The effects of non-magnetic impurities on the properties of superconductors with order parameters (OP) of different symmetry are discussed. In particular, we contrast the case of a dx2 - y2 with various forms of an anisotropic s-wave (ASW) gap. The biggest qualitative difference occurs if the phase of the s-wave OP does not change sign.
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