Coherent acoustic wave oscillations and melting on Ag(111) surface by time resolved x-ray diffraction

被引：11
作者：
Er, Ali Oguz [1 ]
Chen, Jie [2 ,3 ]
Tang, Jau [4 ]
Rentzepis, Peter M. [1 ]
机构：
[1] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA
[2] Shanghai Jiao Tong Univ, Key Lab Laser Plasmas, Minist Educ, Shanghai 200240, Peoples R China
[3] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China
[4] Acad Sinica, Res Ctr Appl Sci, Taipei 11529, Taiwan
来源：
APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 15期
关键词：
PULSED LASERS; ELECTRON; RELAXATION;
D O I：
10.1063/1.3703122
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3703122]
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页数：5
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