锑化铟中载流子密度依赖的晶格稳定性

Carrier-density-dependent lattice stability in InSb.

作者信息

Hillyard P B, Gaffney K J, Lindenberg A M, Engemann S, Akre R A, Arthur J, Blome C, Bucksbaum P H, Cavalieri A L, Deb A, Falcone R W, Fritz D M, Fuoss P H, Hajdu J, Krejcik P, Larsson J, Lee S H, Meyer D A, Nelson A J, Pahl R, Reis D A, Rudati J, Siddons D P, Sokolowski-Tinten K, von der Linde D, Hastings J B

机构信息

Department of Chemistry, Stanford University, Stanford, California 94305, USA.

出版信息

Phys Rev Lett. 2007 Mar 23;98(12):125501. doi: 10.1103/PhysRevLett.98.125501. Epub 2007 Mar 21.

DOI:10.1103/PhysRevLett.98.125501

PMID:17501133

Abstract

The ultrafast decay of the x-ray diffraction intensity following laser excitation of an InSb crystal has been utilized to observe carrier dependent changes in the potential energy surface. For the first time, an abrupt carrier dependent onset for potential energy surface softening and the appearance of accelerated atomic disordering for a very high average carrier density have been observed. Inertial dynamics dominate the early stages of crystal disordering for a wide range of carrier densities between the onset of crystal softening and the appearance of accelerated atomic disordering.

摘要

通过对锑化铟晶体进行激光激发后，利用X射线衍射强度的超快衰减来观察势能表面中与载流子相关的变化。首次观察到势能表面软化存在与载流子相关的突然起始，并且在非常高的平均载流子密度下出现了加速的原子无序化现象。在晶体软化起始和加速原子无序化出现之间的很宽载流子密度范围内，惯性动力学在晶体无序化的早期阶段起主导作用。