Quantum interference between non-magnetic impurities in d_x2-y2-wave superconductors

Details Quantum interference between non-magnetic impurities in d_x2-y2-wave superconductors Quantum interference between non-magnetic impurities in d_x2-y2-wave superconductors

2002-07-09

arxiv.org/abs/cond-mat/0207243v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.66.140508

We study quantum interference of electronic waves that are scattered by multiple non-magnetic impurities in a d_x2-y2-wave superconductor. We show that the number of resonance states in the density-of-states (DOS), as well as their frequency and spatial dependence change significantly as the distance between the impurities or their orientation relative to the crystal lattice is varied. Since the latter effect arises from the momentum dependence of the superconducting gap, we argue that quantum interference is a novel tool to identify the symmetry of unconventional superconductors.

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