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research article

Direct observation of non-fully-symmetric coherent optical phonons by femtosecond x-ray diffraction

Johnson, S. L.
•
Beaud, P.
•
Moehr-Vorobeva, E.
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2013
Physical Review B

We directly measure by femtosecond time-resolved x-ray diffraction the E-g symmetry coherent phonon excited in bismuth by a strong optical pulse. The magnitude of the E-g mode observed is 0.2 pm peak-to-peak, compared against the 2.7-pm initial displacement of the fully symmetric A(1g) mode. The much smaller motion of the E-g mode is a consequence of the short lifetime of the electronic states that drive the atomic motion. The experimentally measured magnitude of the E-g motion allows us to rule out a previously suggested scenario for explaining the dynamics in bismuth that relies on strong coupling between these modes. DOI: 10.1103/PhysRevB.87.054301

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Type
research article
DOI
10.1103/PhysRevB.87.054301
Web of Science ID

WOS:000314681400002

Author(s)
Johnson, S. L.
Beaud, P.
Moehr-Vorobeva, E.
Caviezel, A.
Ingold, G.
Milne, C. J.  
Date Issued

2013

Publisher

American Physical Society

Published in
Physical Review B
Volume

87

Issue

5

Article Number

054301

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSU  
Available on Infoscience
March 28, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/90775
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