Journal Article

PUBDB-2016-03117

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Coherent modulation of the $\mathrm{YBa_ {2}Cu_{3}O_{6+x}}$ atomic structure by displacive stimulated ionic Raman scattering

Mankowsky, R.CFEL*MPG* ; Först, M.CFEL*MPG* ; Loew, T. ; Porras, J. ; Keimer, B.Extern* ; Cavalleri, A.CFEL*MPG*

2015
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevB.91.094308

Abstract: We discuss the mechanism of coherent phonon generation by stimulated ionic Raman scattering, a processdifferent from conventional excitation with near visible optical pulses. Ionic Raman scattering is driven byanharmonic coupling between a directly excited infrared-active phonon mode and other Raman modes. Weexperimentally study the response of YBa$_ 2$Cu$_3$O$_{6+x}$ to the resonant excitation of apical oxygen motions at 20 THzby midinfrared pulses, which has been shown in the past to enhance the interlayer superconducting coupling. Wefind coherent oscillations of four totally symmetric (A$_g$) Raman modes and make a critical assessment of the roleof these oscillatory motions in the enhancement of superconductivity.

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Contributing Institute(s):

1. Forschungsgruppe für strukturelle Dynamik (MPSD)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)
2. Q-MAC - Frontiers in Quantum Materials Control (319286) (319286)

Experiment(s):

1. No specific instrument

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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