Tuning the Intrinsic Anisotropy with Disorder in the CaKFe4As4 Superconductor

dc.contributor.author Torsello, D.
dc.contributor.author Ummarino, G. A.
dc.contributor.author Bekaert, J.
dc.contributor.author Gozzelino, L.
dc.contributor.author Gerbaldo, R.
dc.contributor.author Tanatar, Makariy
dc.contributor.author Canfield, Paul
dc.contributor.author Prozorov, Ruslan
dc.contributor.author Ghigo, G.
dc.contributor.department Ames Laboratory
dc.contributor.department Physics and Astronomy
dc.date 2020-11-03T22:28:08.000
dc.date.accessioned 2021-02-24T20:26:57Z
dc.date.available 2021-02-24T20:26:57Z
dc.date.issued 2020-06-18
dc.description.abstract <p>We report on the anisotropy of the London penetration depth of CaKFe4As4, discussing how it relates to its electronic structure and how it modifies under introduction of disorder, both chemically induced (by Ni substitution) and irradiation induced (by 3.5-MeV protons). Indeed, CaKFe4As4 is particularly suitable for the study of fundamental superconducting properties due to its stoichiometric composition, exhibiting clean-limit behavior in the pristine samples and having a fairly high critical temperature, Tc≈35 K. The London penetration depth λL is measured with a microwave-coplanar-resonator technique that allows us to deconvolve the anisotropic contributions λL,ab and λL,c and obtain the anisotropy parameter γλ=λL,c/λL,ab. The γλ(T) found for the undoped pristine sample is in good agreement with previous literature and is here compared to <em>ab initio</em> density-functional-theory and Eliashberg calculations. The dependence of γλ(T) on both chemical and irradiation-induced disorder is discussed to highlight which method is more suitable to decrease the direction dependence of the electromagnetic properties while maintaining a high critical temperature. Lastly, the relevance of an intrinsic anisotropy such as γλ on application-related anisotropic parameters (critical current, pinning) is discussed in light of the recent employment of CaKFe4As4 in the production of wires.</p>
dc.identifier archive/lib.dr.iastate.edu/ameslab_manuscripts/729/
dc.identifier.articleid 1735
dc.identifier.contextkey 20069782
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/729
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/93172
dc.language.iso en
dc.relation.ispartofseries IS-J 10255
dc.source.bitstream archive/lib.dr.iastate.edu/ameslab_manuscripts/729/IS_J_10255.pdf|||Sat Jan 15 01:45:24 UTC 2022
dc.source.uri 10.1103/PhysRevApplied.13.064046
dc.subject.disciplines Condensed Matter Physics
dc.title Tuning the Intrinsic Anisotropy with Disorder in the CaKFe4As4 Superconductor
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication c5a8128b-7d98-4b8f-92d7-b1385e345713
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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