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dc.creatorHenighan, T
dc.creatorTrigo, M
dc.creatorBonetti, S
dc.creatorGranitzka, P
dc.creatorHigley, D
dc.creatorChen, Z
dc.creatorJiang, MP
dc.creatorKukreja, R
dc.creatorGray, A
dc.creatorReid, AH
dc.creatorJal, E
dc.creatorHoffmann, MC
dc.creatorKozina, M
dc.creatorSong, S
dc.creatorChollet, M
dc.creatorZhu, D
dc.creatorXu, PF
dc.creatorJeong, J
dc.creatorCarva, K
dc.creatorMaldonado, P
dc.creatorOppeneer, PM
dc.creatorSamant, MG
dc.creatorParkin, SSP
dc.creatorReis, DA
dc.creatorDürr, HA
dc.date.accessioned2021-02-03T16:12:39Z
dc.date.available2021-02-03T16:12:39Z
dc.date.issued2016-06-10
dc.identifier.issn2469-9950
dc.identifier.issn2469-9969
dc.identifier.doihttp://dx.doi.org/10.34944/dspace/5694
dc.identifier.otherDO0WB (isidoc)
dc.identifier.urihttp://hdl.handle.net/20.500.12613/5712
dc.description.abstract© 2016 American Physical Society. We use femtosecond time-resolved hard x-ray scattering to detect coherent acoustic phonons generated during ultrafast laser excitation of ferromagnetic bcc Fe films grown on MgO(001). We observe the coherent longitudinal-acoustic phonons as a function of wave vector through analysis of the temporal oscillations in the x-ray scattering signal. The width of the extracted strain wave front associated with this coherent motion is ∼100 fs. An effective electronic Grüneisen parameter is extracted within a two-temperature model. However, ab initio calculations show that the phonons are nonthermal on the time scale of the experiment, which calls into question the validity of extracting physical constants by fitting such a two-temperature model.
dc.format.extent220301-
dc.language.isoen
dc.relation.haspartPhysical Review B
dc.relation.isreferencedbyAmerican Physical Society (APS)
dc.subjectcond-mat.mtrl-sci
dc.subjectcond-mat.mtrl-sci
dc.titleGeneration mechanism of terahertz coherent acoustic phonons in Fe
dc.typeArticle
dc.type.genreJournal Article
dc.relation.doi10.1103/PhysRevB.93.220301
dc.ada.noteFor Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
dc.date.updated2021-02-03T16:12:36Z
refterms.dateFOA2021-02-03T16:12:40Z


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