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dc.contributor.author윤석현-
dc.date.accessioned2018-12-31T16:30:20Z-
dc.date.available2018-12-31T16:30:20Z-
dc.date.issued2018-
dc.identifier.issn2469-9950-
dc.identifier.issn2469-9969-
dc.identifier.otherOAK-23563-
dc.identifier.urihttps://dspace.ewha.ac.kr/handle/2015.oak/247993-
dc.description.abstractWe employ an optical pump-probe technique to study coherent phonon oscillations in Ca2RuO4. We find that oscillation amplitude of an A(g) symmetric phonon mode is strongly suppressed at 260 K, a putative transition point of orbital ordering. The oscillation also shows a gradual but huge change in its phase, such that the oscillation even flips over with a 180. change across the temperature. Density functional theory calculations indicate that the Ag phonon has an eigenmode of octahedral distortion with conventional tilting along the a axis and antipolar distortion of apical oxygen. Careful inspection of the lattice captures an unusually large antipolar distortion in low-temperature structures, which may play a crucial role for the phase transition at 260 K.-
dc.languageEnglish-
dc.publisherAMER PHYSICAL SOC-
dc.titleAbnormal phase flip in the coherent phonon oscillations of Ca2RuO4-
dc.typeArticle-
dc.relation.issue16-
dc.relation.volume98-
dc.relation.indexSCIE-
dc.relation.indexSCOPUS-
dc.relation.journaltitlePHYSICAL REVIEW B-
dc.identifier.doi10.1103/PhysRevB.98.161115-
dc.identifier.wosidWOS:000447485700003-
dc.identifier.scopusid2-s2.0-85055093653-
dc.author.googleLee, Min-Cheol-
dc.author.googleKim, Choong H.-
dc.author.googleKwak, Inho-
dc.author.googleKim, J.-
dc.author.googleYoon, S.-
dc.author.googlePark, Byung Cheol-
dc.author.googleLee, Bumjoo-
dc.author.googleNakamura, F.-
dc.author.googleSow, C.-
dc.author.googleMaeno, Y.-
dc.author.googleNoh, T. W.-
dc.author.googleKim, K. W.-
dc.contributor.scopusid윤석현(55732105900)-
dc.date.modifydate20210929142406-


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