Ultrafast electronic disorder in heat-induced structural deformations and phase transitions in metals

被引:16
作者
Guo, CL [1 ]
Taylor, AJ [1 ]
机构
[1] Univ Calif Los Alamos Natl Lab, Div Mat Sci & Technol, Condensed Matter & Thermal Phys Grp, Los Alamos, NM 87545 USA
来源
PHYSICAL REVIEW B | 2000年 / 62卷 / 09期
关键词
D O I
10.1103/PhysRevB.62.5382
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Heat-induced structural deformations and phase transitions of gold and silver are studied using 1.55-eV, 120-fs ultrashort laser pulses. The dynamics of the heating process is monitored by measuring the time evolution of the dielectric constants following optical excitation. Intensity-dependent dielectric constants in silver and old show similarities with the photon-energy-dependent dielectric constants, which is shown to indirectly map out the degree of hear-induced electronic disorder in these noble metals. This observation strongly suggests that the heat-induced structural deformations and phase transitions in metals are tied to the electronic disorder and band-structure collapse.
引用
收藏
页码:5382 / 5386
页数:5
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