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Currents Induced by Magnetic Impurities in Superconductors with Spin-Orbit Coupling
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Institute for Materials Science, United States.
2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 115, no 11, 116602Article in journal (Refereed) Published
Abstract [en]

We show that superconducting currents are generated around magnetic impurities and ferromagnetic islands proximity coupled to superconductors with finite spin-orbit coupling. Using the Ginzburg-Landau theory, T-matrix calculation, as well as self-consistent numerical simulation on a lattice, we find a strong dependence of the current on the direction and magnitude of the magnetic moment. We establish that in the case of point magnetic impurities, the current is carried by the induced Yu-Shiba-Rusinov (YSR) subgap states. In the vicinity of the phase transition, where the YSR states cross at zero energy, the current increases dramatically. Furthermore, we show that the currents are orthogonal to the local spin polarization and, thus, can be probed by measuring the spin-polarized local density of states.

Place, publisher, year, edition, pages
2015. Vol. 115, no 11, 116602
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-174218DOI: 10.1103/PhysRevLett.115.116602ISI: 000361040800005ScopusID: 2-s2.0-84942133287OAI: diva2:861398

QC 20151016

Available from: 2015-10-16 Created: 2015-10-02 Last updated: 2015-11-25Bibliographically approved

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Pershoguba, Sergey S.Balatsky, Alexander V.
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