Observation of Structural Anisotropy and the Onset of Liquid-like Motion during the Non-thermal Melting of InSb

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. K. ; Matthews, T. ; Falcone, R. W. ; Cavalieri, A. L. ; Dritz, D. M. ; Lee, S. H. ; Bucksbau, P. H. ; Reis, D. A. ; Rudati, J. ; Macrander, A. T. ; Fuoss, P. H.

Stanford Linear Accelerator Center

关键词: Intermetallic Compounds;    Indium Alloys;    X-Ray Diffraction;    Morphological Changes Chem, Matsci, Synchrad;    36 Materials Science;   

DOI  :  10.2172/878359
RP-ID  :  SLAC-PUB-11507
RP-ID  :  AC02-76SF00515
RP-ID  :  878359

美国|英语

来源: UNT Digital Library

【 摘 要 】

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 liquid-like 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.