Microwave-induced zero-resistance state in two-dimensional electron systems with unidirectional periodic modulation
Microwave-induced zero-resistance state in two-dimensional electron systems with unidirectional periodic modulation
复制标题
单向周期调制二维电子系统中微波诱导的零电阻态
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. Latyshev
中科院分区：
文献类型：
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作者：
A. Bykov;I. S. Strygin;A. V. Goran;A. K. Kalagin;E. Rodyakina;A. Latyshev
在这项研究中，我们制作了横向超晶格（LSL）的基础上选择性掺杂的GaAs/AlAs异质结构与高迁移率的二维（2D）电子气。LSL是使用电子束光刻和剥离技术形成的，该技术在异质结顶部产生一组金属条。LSL中的2D电子气调制的幅度由施加到金属条的栅极电压控制。在温度T = 1.6 K，磁场B < 1 T的条件下，利用两种不同周期（a = 200 nm和500 nm）的激光器研究了频率为110-150 GHz的微波辐射对二维电子输运的影响.我们发现，在微波辐射下，单向周期调制的二维系统中出现了零电阻态。这些ZRS都位于最小的可重复性振荡。
In this study we fabricated lateral superlattices (LSLs) based on the selectively doped GaAs/AlAs heterostructures with a high-mobility two-dimensional (2D) electron gas. The LSLs were formed using the electron-beam lithography and lift-off techniques, which produced a set of metallic strips on top of a heterojunction. The amplitude of the 2D electron gas modulation in the LSL was controlled by the gate voltage applied to the metallic strips. The LSLs with two different periods (a = 200 nm and 500 nm) were used to investigate the influence of microwave radiation with the frequency of 110–150 GHz on the 2D electron transport at the temperature T = 1.6 K in the magnetic field B < 1 T. We have found that zero-resistance states (ZRSs) appear under the microwave radiation in the 2D systems with a unidirectional periodic modulation. These ZRSs are located at the minima of commensurability oscillations.