Coherent acoustic wave oscillations and melting on Ag(111) surface by time resolved x-ray diffraction
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The transient structural disorder on the Ag(111) crystal after excitation with fs pulses was studied by means of time resolved x-ray diffraction. The lattice disorder after UV irradiation is detected by changes in the XRD rocking curve including peak shift, broadening, and total diffraction intensity. We have observed blast and pressure wave formation and melting and mosaic crystal formation during re-crystallization. A blast force was formed within 2 ps after fs UV irradiation of the crystal, followed lattice contraction, melting phase transition, and mosaic crystal formation as the temperature decreases below melting. The experimental data are also supported by theoretical simulations. © 2012 American Institute of Physics.
author list (cited authors)
Er, A. O., Chen, J., Tang, J., & Rentzepis, P. M.