摘要
运用格林函数的解析方法研究金属双层膜的电子输运.考虑了量子尺寸效应和来自杂质、粗糙表面和粗糙界面三方面的散射,计算单粒子格林函数和平行电导率,得到了金属双层膜的电导公式.计算结果表明,在薄膜极限和表面及界面散射的最低阶近似下,系统总电导率等于各子能级通道的电导率之和,而各子能级通道中杂质、表面和界面产生的散射率是可相加的.
An analytical Green's function approach to the study of the electrical transport in bimetallic films is presented. Taking into account the quantum size effects and considering three types of scattering from bulk impurities, rough surfaces and a rough interface, we calculate the one-partical Green's functions and the in-plane conductivity, yielding a new formula for conductivity in bimetallic films. It is found that in the thin-film limit and to the lowest order in the surface and interface scattering, the total conductivity is given by a sum of conductivities of all the subbands and for each subband the scattering rates due to the impurities, surfaces and interface are additive.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第2期249-257,共9页
Acta Physica Sinica
基金
国家科学技术委员会攀登计划资助的课题
