FRIEDEL OSCILLATIONS IN NANOWIRES AT FINITE BIAS VOLTAGE

被引：0
|
作者：
Gorczyca, A. [1 ]
Maska, M. [1 ]
Mierzejewski, M. [1 ]
机构：
[1] Univ Silesia, Inst Phys, Dept Theoret Phys, PL-40007 Katowice, Poland
来源：
ELECTRON TRANSPORT IN NANOSYSTEMS | 2008年
关键词：
nanowire; Friedel oscillations; nonequilibrium Green functions;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We investigate the charge density oscillations in a nanowire coupled asymmetrically to two leads. Depending on this asymmetry, the Friedel oscillations can either be characterized by a single wave-vector or become a superposition of oscillations with different wave-vectors. Using the formalism of nonequilibrium Keldysh Green functions, we derive a simple equation that determines bias voltage dependence of the wave-length of the oscillations. Finally, we discuss limitations of the commonly used formula that describes the spatial character of the Friedel oscillations.
引用
收藏
页码：37 / 47
页数：11
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