Observation of structural anisotropy and the onset of liquidlike motion during the nonthermal melting of InSb.
作者信息
Gaffney K J, Lindenberg A M, Larsson J, Sokolowski-Tinten K, Blome C, Synnergren O, Sheppard J, Caleman C, MacPhee A G, Weinstein D, Lowney D P, Allison T, Matthews T, Falcone R W, Cavalieri A L, Fritz D M, Lee S H, Bucksbaum P H, Reis D A, Rudati J, Macrander A T, Fuoss P H, Kao C C, Siddons D P, Pahl R, Moffat K, Als-Nielsen J, Duesterer S, Ischebeck R, Schlarb H, Schulte-Schrepping H, Schneider J, von der Linde D, Hignette O, Sette F, Chapman H N, Lee R W, Hansen T N, Wark J S, Bergh M, Huldt G, van der Spoel D, Timneanu N, Hajdu J, Akre R A, Bong E, Krejcik P, Arthur J, Brennan S, Luening K, Hastings J B
机构信息
Stanford Synchrotron Radiation Laboratory/SLAC, Menlo Park, California 94025, USA.
出版信息
Phys Rev Lett. 2005 Sep 16;95(12):125701. doi: 10.1103/PhysRevLett.95.125701. Epub 2005 Sep 12.
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.
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