Microwave-Induced Magneto-Intersubband Scattering in a Square Lattice of Antidots
Microwave-Induced Magneto-Intersubband Scattering in a Square Lattice of Antidots
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DOI：
10.1134/s0021364019220041
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发表时间：
2019-11-01
期刊：
影响因子：
1.3
通讯作者：
Vitkalov, S. A.
中科院分区：
文献类型：
--
作者：
Bykov, A. A.;Strygin, I. S.;Vitkalov, S. A.
本文研究了微波辐射对GaAs量子阱中周期d约为0.8 μ m的正方形反点晶格中电子低温磁输运的影响。它示出，由于在子带中的电子密度之间的显着差异，在所调查的反点晶格中的电阻的可伸缩性振荡观察到仅为第一子带。结果表明，在回旋共振条件下，微波辐照导致在主磁化率峰区域的逆磁场中形成周期性的电阻振荡。它是建立这些振荡的周期对应于磁子带间振荡的周期。所观察到的效果是由子带和E-1和E-2的电子加热之间的差异所造成的子带间散射率的增加来解释的。
The effect of microwave radiation on low-temperature electron magnetotransport in a square antidot lattice with a period of d approximate to 0.8 mu m based on a GaAs quantum well with two occupied energy subbands E-1 and E-2 is investigated. It is shown that, owing to a significant difference between the electron densities in the subbands, commensurability oscillations of the resistance in the investigated antidot lattice are observed only for the first subband. It is found that microwave irradiation under the cyclotron resonance condition results in the formation of resistance oscillations periodic in the inverse magnetic field in the region of the main commensurability peak. It is established that the period of these oscillations corresponds to the period of magneto-intersubband oscillations. The observed effect is explained by the increase in the rate of intersubband scattering caused by the difference between the electron heating in the subbands and E-1 and E-2.