A complete characterization of the unit cell dynamics of a laser-excited tellurium crystal is demonstrated 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 A1 mode quantitatively consistent with the predictions of a density functional theory model.
Original Publication
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Johnson SL, Vorobeva E, Beaud P, Milne CJ, Ingold G
Full reconstruction of a crystal unit cell structure during coherent femtosecond motion
Physical Review Letters. 2009; 103(20): 205501 (4 pp.). https://doi.org/10.1103/PhysRevLett.103.205501
DORA PSI