Quantum interference between nonmagnetic impurities in dx2−y2-wave superconductors

Dirk K. Morr; Nikolaos A. Stavropoulos

doi:10.1103/PhysRevB.66.140508

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Quantum interference between nonmagnetic impurities in dx2−y2-wave superconductors

Dirk K. Morr, Nikolaos A. Stavropoulos

DOI 10.1103/PhysRevB.66.140508 · Physical Review B

T1

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Abstract

We study quantum interference of electronic waves that are scattered by multiple nonmagnetic impurities in a dx2−y2-wave superconductor. We show that the number of resonance states in the density of states, 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 tool to identify the symmetry of unconventional superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown