Quasiparticle bound state induced by a single impurity in a d-wave superconductor

C. H. Choi

doi:10.1103/PhysRevB.63.064507

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Quasiparticle bound state induced by a single impurity in a d-wave superconductor

C. H. Choi

DOI 10.1103/PhysRevB.63.064507 · Physical Review B

T1

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Abstract

We study the local density of states near a single impurity in a d-wave superconductor, while taking into account the effect of the anisotropic impurity scattering. In the presence of the non-s-wave scattering channels, it is possible to have a bound state at the Fermi energy even for the finite strengths of impurity scattering. This is in sharp contrast to the purely s-wave impurity potential in which the bound state can be induced only in the unitarity limit. We also discuss the effect of the magnetic moment of an impurity atom. A resonance peak of a nonmagnetic impurity can be split into two by the magnetic moment.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown