Nodeless superconductivity in the type-II Dirac semimetal PdTe2: London penetration depth and pairing-symmetry analysis Orth, Peter Teknowijoyo, Serafim Jo, Na Hyun Scheurer, Mathias Tanatar, Makariy Canfield, Paul Cho, Kyuil Bud’ko, Sergey Orth, Peter Canfield, Paul Prozorov, Ruslan
dc.contributor.department Ames Laboratory
dc.contributor.department Physics and Astronomy 2019-11-25T21:24:57.000 2020-06-29T23:21:20Z 2020-06-29T23:21:20Z 2018-07-01
dc.description.abstract <p>Superconducting gap structure was probed in type-II Dirac semimetal PdTe2 by measuring the London penetration depth using the tunnel diode resonator technique. At low temperatures, the data for two samples are well described by a weak-coupling exponential fit yielding λ(T=0)=230 nm as the only fit parameter at a fixed Δ(0)/Tc≈1.76, and the calculated superfluid density is consistent with a fully gapped superconducting state characterized by a single gap scale. Electrical resistivity measurements for in-plane and inter-plane current directions find very low and nearly temperature-independent normal-state anisotropy. The temperature dependence of resistivity is typical for conventional phonon scattering in metals. We compare these experimental results with expectations from a detailed theoretical symmetry analysis and reduce the number of possible superconducting pairing states in PdTe2 to only three nodeless candidates: a regular, topologically trivial s-wave pairing, and two distinct odd-parity triplet states that both can be topologically nontrivial depending on the microscopic interactions driving the superconducting instability.</p>
dc.identifier archive/
dc.identifier.articleid 1207
dc.identifier.contextkey 12516483
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/204
dc.language.iso en
dc.relation.ispartofseries IS-J 9708
dc.source.bitstream archive/|||Fri Jan 14 22:24:37 UTC 2022
dc.source.uri 10.1103/PhysRevB.98.024508
dc.subject.disciplines Condensed Matter Physics
dc.title Nodeless superconductivity in the type-II Dirac semimetal PdTe2: London penetration depth and pairing-symmetry analysis
dc.type article
dc.type.genre article
dspace.entity.type Publication
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