title: Observation of structural anisotropy and the onset of liquidlike motion during the nonthermal melting of InSb.
abstract: The melting dynamics of laser excited InSb have been studied with femtosecond x-ray diffraction. These measurements observe the delayed onset of diffusive atomic motion, signaling the appearance of liquidlike dynamics. They also demonstrate that the root-mean-squared displacement in the [111] direction increases faster than in the [110] direction after the first 500 fs. This structural anisotropy indicates that the initially generated fluid differs significantly from the equilibrium liquid.
authors.affiliation: Stanford Synchrotron Radiation Laboratory/SLAC, Menlo Park, California 94025, USA.
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