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

S. L. Johnson, P. Beaud, E. Möhr-Vorobeva +3

We directly measure by femtosecond time-resolved x-ray diffraction the E${}_g$ symmetry coherent phonon excited in bismuth by strong optical excitation. The magnitude of the E${}_g$ mo…