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Inhomogeneous superconductivity in LuxZr1-x B12 dodecaborides with dynamic charge stripes

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dc.contributor.authorAzarevich, A.
dc.contributor.authorBogach, A.
dc.contributor.authorGlushkov, V.
dc.contributor.authorDemishev, S.
dc.contributor.authorKuznetsov, A.
dc.contributor.authorКузнецов, Алексей Владимирович
dc.date.accessioned2024-11-29T12:58:07Z
dc.date.available2024-11-29T12:58:07Z
dc.date.issued2021
dc.description.abstract© 2021 American Physical Society.We have studied the normal and superconductive state characteristics (resistivity, Hall coefficient, heat capacity, and magnetization) of model strongly correlated electronic systems LuxZr1-xB12 with cooperative Jahn-Teller instability of the boron rigid cage and with dynamic charge stripes. It was found that these metals are s-wave dirty limit superconductors with a small mean free path of charge carriers l=5-140Å and with a Cooper pair size changing nonmonotonously in the range 450-4000 Å. The parent ZrB12 and LuB12 borides are type-I superconductors, and Zr to Lu substitution induces a type-I to type-II phase transition providing a variation of the Ginzburg-Landau-Maki parameter in the limits 0.65≤κ1,2≤6. We argue in favor of the two-band scenario of superconductivity in LuxZr1-xB12 with gap values Δ1∼14K and Δ2∼6-8K, with pairing corresponding to strong coupling limit (λe-ph∼1) in the upper band, and to weak coupling (λe-ph∼0.1-0.4) in the lower one. A pseudogap Δps-gap∼60-110K is observed in LuxZr1-xB12 above Tc. We discuss also the possibility of anisotropic single-band superconductivity with stripe-induced both pair breaking and anisotropy, and analyze the origin of a unique enhanced surface superconductivity detected in these model compounds.
dc.identifier.citationInhomogeneous superconductivity in LuxZr1-x B12 dodecaborides with dynamic charge stripes / Azarevich, A. [et al.] // Physical Review B. - 2021. - 103. - № 10. - 10.1103/PhysRevB.103.104515
dc.identifier.doi10.1103/PhysRevB.103.104515
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevB.103.104515
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85103839613&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000646630000003
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/23867
dc.relation.ispartofPhysical Review B
dc.titleInhomogeneous superconductivity in LuxZr1-x B12 dodecaborides with dynamic charge stripes
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue10
oaire.citation.volume103
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relation.isAuthorOfPublication.latestForDiscovery34e707d0-45f2-4f21-906e-e985fcdca06b
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