Local time-reversal-symmetry breaking in dx2−y2 superconductors

M. J. Graf; A. V. Balatsky; J. A . Sauls

doi:10.1103/PhysRevB.61.3255

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Local time-reversal-symmetry breaking in dx2−y2 superconductors

M. J. Graf, A. V. Balatsky, J. A . Sauls

DOI 10.1103/PhysRevB.61.3255 · Physical Review B

T1

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Abstract

We show that an isolated impurity in a spin singlet dx2−y2 superconductor generates a dxy order parameter with locally broken time-reversal symmetry. The origin of this effect is a coupling between the dx2−y2 and the dxy order parameter induced by spin-orbit scattering off the impurity. The signature of locally broken time-reversal symmetry is an induced orbital charge current near the impurity, which generates a localized magnetic field in the vicinity of the impurity. We present a microscopic theory for the impurity-induced dxy component, discuss its spatial structure as well as the pattern of induced current and local magnetic field near the localized impurity spin.

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.	80	Pressure not reported	unknown