Ultrafast nonthermal terahertz electrodynamics and possible quantum energy transfer in the Nb3Sn superconductor

dc.contributor.author Yang, Xu
dc.contributor.author Orth, Peter
dc.contributor.author Zhao, X.
dc.contributor.author Vaswani, Chirag
dc.contributor.author Sundahl, C.
dc.contributor.author Song, Boqun
dc.contributor.author Yao, Yong-Xin
dc.contributor.author Cheng, Di
dc.contributor.author Liu, Zhiyan
dc.contributor.author Orth, Peter
dc.contributor.author Mootz, M.
dc.contributor.author Kang, J. H.
dc.contributor.author Perakis, I. E.
dc.contributor.author Wang, Cai-Zhuang
dc.contributor.author Ho, Kai-Ming
dc.contributor.author Eom, C. B.
dc.contributor.author Wang, Jigang
dc.contributor.department Ames Laboratory
dc.contributor.department Physics and Astronomy
dc.date 2019-09-21T21:45:05.000
dc.date.accessioned 2020-06-29T23:22:42Z
dc.date.available 2020-06-29T23:22:42Z
dc.date.issued 2019-03-07
dc.description.abstract <p>We report terahertz (THz) electrodynamics of a moderately clean A15 superconductor (SC) following ultrafast excitation to manipulate quasiparticle (QP) transport. In the Martensitic normal state, we observe a photo enhancement in the THz conductivity using optical pulses, while the opposite is observed for the THz pump. This demonstrates <em>wavelength-selective</em> nonthermal control of conductivity distinct from sample heating. The photo enhancement persists up to an additional critical temperature, above the SC one, from a competing electronic order. In the SC state, the fluence dependence of pair-breaking kinetics together with an analytic model provides an implication for a “one photon to one Cooper pair” nonresonant energy transfer during the 35-fs laser pulse; i.e., the fitted photon energy ℏω absorption to create QPs set by 2ΔSC/ℏω=0.33%. This is more than one order of magnitude smaller than in previously studied BCS SCs, which we attribute to strong electron-phonon coupling and possible influence of phonon condensation.</p>
dc.identifier archive/lib.dr.iastate.edu/ameslab_manuscripts/376/
dc.identifier.articleid 1387
dc.identifier.contextkey 14946231
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/376
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/7318
dc.language.iso en
dc.relation.ispartofseries IS-J 9913
dc.source.bitstream archive/lib.dr.iastate.edu/ameslab_manuscripts/376/IS_J_9913.pdf|||Fri Jan 14 23:50:55 UTC 2022
dc.source.uri 10.1103/PhysRevB.99.094504
dc.subject.disciplines Condensed Matter Physics
dc.title Ultrafast nonthermal terahertz electrodynamics and possible quantum energy transfer in the Nb3Sn superconductor
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication a2f70a9e-201d-4351-9b89-24cfb9d6344d
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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