Direct-current control of radiation-induced differential magnetoresistance oscillations in two-dimensional electron systems

被引：18
|
作者：
Lei, X. L. [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200030, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 11期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2783260
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetoresistance oscillations in two-dimensional electron systems driven simultaneously by a strong direct current and a microwave irradiation are analyzed within a unified microscopic scheme treating both excitations on an equal footing. The microwave-induced resistance oscillations are described by a parameter epsilon(omega) proportional to the radiation frequency, while the dc-induced resistance oscillations are governed by a parameter epsilon(j) proportional to the current density. In the presence of both a microwave radiation and a strong dc, the combined parameter epsilon(omega)+epsilon(j) is shown to control the main resistance oscillations, in agreement with the recent measurement [Zhang , Phys. Rev. Lett. 98, 106804 (2007)].
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页数：3
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