Phys. Rev. Lett. 103, 205501 (2009) [4 pages]Full Reconstruction of a Crystal Unit Cell Structure during Coherent Femtosecond MotionReceived 10 July 2009; published 10 November 2009 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 A1 mode quantitatively consistent with the predictions of a density functional theory model. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.205501
DOI:
10.1103/PhysRevLett.103.205501
PACS:
63.20.K−, 61.80.Ba, 78.47.J−
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