dc.contributor.author
Oppen, Felix von
dc.contributor.author
Franke, Katharina J.
dc.date.accessioned
2022-05-23T08:44:25Z
dc.date.available
2022-05-23T08:44:25Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/34111
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-33829
dc.description.abstract
Theoretical descriptions of Yu-Shiba-Rusinov (YSR) states induced by magnetic impurities inside the gap of a superconductor typically rely on a classical spin model or are restricted to spin-12 quantum spins. These models fail to account for important aspects of YSR states induced by transition-metal impurities, including the effects of higher quantum spins coupled to several conduction-electron channels, crystal or ligand-field effects, and magnetic anisotropy. We introduce and explore a zero-bandwidth model, which incorporates these aspects, is readily solved numerically, and analytically tractable in several limiting cases. The principal simplification of the model is to neglect Kondo renormalizations of the exchange couplings between impurity spin and conduction electrons. Nevertheless, we find excellent correspondence in those cases, in which we can compare our results to existing numerical-renormalization-group calculations. We apply the model to obtain and understand phase diagrams as a function of pairing strength and magnetic anisotropy as well as subgap excitation spectra. The single-channel case is most relevant for transition-metal impurities embedded into metallic coordination complexes on superconducting substrates, while the multichannel case models transition-metal adatoms.
en
dc.format.extent
23 Seiten (Manuskriptversion)
dc.rights.uri
http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen
dc.subject
Impurities in superconductors
en
dc.subject
Kondo effect
en
dc.subject
Superconductors
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::539 Moderne Physik
dc.title
Yu-Shiba-Rusinov states in real metals
dc.type
Wissenschaftlicher Artikel
dc.identifier.sepid
84563
dcterms.bibliographicCitation.articlenumber
205424
dcterms.bibliographicCitation.doi
10.1103/PhysRevB.103.205424
dcterms.bibliographicCitation.journaltitle
Physical Review B
dcterms.bibliographicCitation.number
20
dcterms.bibliographicCitation.originalpublishername
American Physical Society
dcterms.bibliographicCitation.originalpublisherplace
Berlin, Ridge, NY
dcterms.bibliographicCitation.volume
103 (2021)
dcterms.bibliographicCitation.url
https://link.aps.org/doi/10.1103/PhysRevB.103.205424
dcterms.rightsHolder.url
https://journals.aps.org/copyrightFAQ.html#free
refubium.affiliation
Physik
refubium.affiliation.other
Institut für Theoretische Physik

refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
2469-9950
dcterms.isPartOf.eissn
2469-9969