Hot-electron lifetimes in metals:: A combined ab initio calculation and ballistic electron emission spectroscopy analysis -: art. no. 085107

被引：26

作者：

Ladstädter, F

de Pablos, PF

Hohenester, U

Puschnig, P

Ambrosch-Draxl, C

de Andrés, PL

García-Vidal, FJ

Flores, F

机构：

[1] Graz Univ, Inst Theoret Phys, A-8010 Graz, Austria

[2] Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain

[3] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.68.085107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A first-principles analysis of ballistic electron emission spectroscopy (BEES) is used to extract hot-electron lifetimes in metals. The lifetimes are computed within an ab initio framework based on density-functional theory and the GW approximation, and are used in a Keldysh Green function approach for the calculation of BEES currents. For the two prototypical systems Au/Si and Pd/Si, which exhibit a significantly different scattering dynamics, we find an excellent agreement with experiment, which allows an accurate determination of hot-electron lifetimes.

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