STEADY-STATE TRANSPORT IN MESOSCOPIC SYSTEMS ILLUMINATED BY ALTERNATING-FIELDS

被引:56
作者
DATTA, S
ANANTRAM, MP
机构
来源
PHYSICAL REVIEW B | 1992年 / 45卷 / 23期
关键词
D O I
10.1103/PhysRevB.45.13761
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper we present a Landauer-type expression for the time-averaged dc current in a mesoscopic device illuminated by a coherent ac field, assuming phase-breaking processes to be restricted to the contacts. This expression is derived starting from the nonequilibrium Green-function formalism which rigorously accounts for the exclusion principle. However, the (1 - f) factors that are often assumed do not appear in our expression. This does not affect the result if the transmission is reciprocal. But for traveling-wave fields the transmission is nonreciprocal even in zero magnetic fields and the magnitude of the resulting current is affected by the presence or absence of the (1 - f) factor.
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页码:13761 / 13764
页数:4
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