Direct measurement of anharmonic decay channels of a coherent phonon

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dc.contributor.authorTeitelbaum, Samuel W.
dc.contributor.authorHenighan, Thomas
dc.contributor.authorHuang, Yijing
dc.contributor.authorLiu, Hanzhe
dc.contributor.authorJiang, Mason P.
dc.contributor.authorZhu, Diling
dc.contributor.authorChollet, Matthieu
dc.contributor.authorSato, Takahiro
dc.contributor.authorMurray, Éamonn D.
dc.contributor.authorFahy, Stephen B.
dc.contributor.authorO'Mahony, Shane
dc.contributor.authorBailey, Trevor P.
dc.contributor.authorUher, Ctirad
dc.contributor.authorTrigo, Mariano
dc.contributor.authorReis, David A.
dc.contributor.funderU.S. Department of Energyen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderIrish Research Councilen
dc.date.accessioned2019-03-01T12:33:02Z
dc.date.available2019-03-01T12:33:02Z
dc.date.issued2018-09-20
dc.date.updated2019-03-01T12:22:35Z
dc.description.abstractWe report channel-resolved measurements of the anharmonic coupling of the coherent A1g phonon in photoexcited bismuth to pairs of high wave vector acoustic phonons. The decay of a coherent phonon can be understood as a parametric resonance process whereby the atomic displacement periodically modulates the frequency of a broad continuum of modes. This coupling drives temporal oscillations in the phonon mean-square displacements at the A1g frequency that are observed across the Brillouin zone by femtosecond x-ray diffuse scattering. We extract anharmonic coupling constants between the A1g and several representative decay channels that are within an order of magnitude of density functional perturbation theory calculations.en
dc.description.sponsorshipU.S. Department of Energy (Contract No. DE-AC02-76SF00515; Award No. DESC-0008574); Irish Research Council (GOIPG/2015/2784)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid125901
dc.identifier.citationTeitelbaum, S.W., Henighan, T., Huang, Y., Liu, H., Jiang, M. P., Zhu, D., Chollet, M., Sato, T., Murray, É. D., Fahy, S., O’Mahony, S., Bailey, T. P., Uher, C., Trigo, M. and Reis, D. A. (2018) 'Direct measurement of anharmonic decay channels of a coherent phonon', Physical Review Letters, 121(12), 125901 (6pp). doi:10.1103/PhysRevLett.121.125901en
dc.identifier.doi10.1103/PhysRevLett.121.125901
dc.identifier.endpage6en
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.issued12en
dc.identifier.journaltitlePhysical Review Lettersen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/7559
dc.identifier.volume121en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/12/IA/1601/IE/Ultrafast energy dissipation in semimetals and semiconductors: Simulation based on first-principles electronic structure theory/en
dc.relation.urihttps://link.aps.org/doi/10.1103/PhysRevLett.121.125901
dc.rights© 2018, American Physical Society. All rights reserved.en
dc.subjectCoherent phononen
dc.subjectAnharmonic couplingen
dc.subjectDecayen
dc.subjectTemporal oscillationsen
dc.titleDirect measurement of anharmonic decay channels of a coherent phononen
dc.typeArticle (peer-reviewed)en
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