title: Full reconstruction of a crystal unit cell structure during coherent femtosecond motion.
abstract: We present a complete characterization of the unit cell dynamics of a laser-excited tellurium crystal using femtosecond x-ray diffraction. The analysis offers a quantitative measure of the unit cell dynamics without making any assumptions on the symmetry of the excited-state motion. The results show a large-amplitude coherently excited A(1) mode quantitatively consistent with the predictions of a density functional theory model.
authors.affiliation: Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland. steve.johnson@psi.ch
authors.forename: S L
authors.initials: SL
authors.lastname: Johnson
authors.forename: E
authors.initials: E
authors.lastname: Vorobeva
authors.forename: P
authors.initials: P
authors.lastname: Beaud
authors.forename: C J
authors.initials: CJ
authors.lastname: Milne
authors.forename: G
authors.initials: G
authors.lastname: Ingold