Broken time-reversal symmetry in a Josephson junction with an Anderson impurity between a two-band and a single-band superconductor

Y. Avishai; T. K. Ng

doi:10.1103/PhysRevB.81.104501

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Broken time-reversal symmetry in a Josephson junction with an Anderson impurity between a two-band and a single-band superconductor

Y. Avishai, T. K. Ng

DOI 10.1103/PhysRevB.81.104501 · Physical Review B

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Abstract

A Josephson junction consisting of an Anderson impurity weakly coupled on one side with a two-band superconductor and on the other side with a a single-band superconductor exposes a time-reversal breaking ground state within a finite domain of the U−J plane (here U is the correlation strength and J is the coupling between the two bands). In this regime, the impurity magnetic moment is attenuated and order-parameter phase differences across the junction are neither 0 nor π. This indicates a fundamental and distinct role of strong correlations: driving a system into a time-reversal breaking ground state.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	39	Pressure not reported	unknown
Nb3Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown