High harmonics of the cyclotron resonance in microwave transmission of a high-mobility two-dimensional electron system
High harmonics of the cyclotron resonance in microwave transmission of a high-mobility two-dimensional electron system
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高迁移率二维电子系统微波传输中回旋共振的高次谐波
DOI：
10.1103/physrevresearch.3.l012013
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
A. Pimenov
中科院分区：
文献类型：
--
作者：
M. L. Savchenko;A. Shuvaev;I. A. Dmitriev;A. A. Bykov;A. K. Bakarov;Z. D. Kvon;A. Pimenov
本文报道了在高迁移率的二维电子系统中观察到的圆极化微波辐射透过率的磁振荡现象。这些振荡反映了回旋共振的高次谐波对辐射的吸收增强，并伴随着在直流传输中同时测量的微波诱导的电阻振荡(MIRO)。虽然透射率振荡的相对幅度(高达1%)看起来很小，但它们代表了吸收系数的显著(大于50%)调制。对所得结果的分析表明，透过率振荡的低衰减、大小和偏振依赖关系精确地符合描述远距离无序加宽的朗道能级之间的光子辅助散射的理论。提取的样本参数较好地描述了同时测量的MIRO。我们的结果提供了对米罗偏振免疫问题的洞察，并证明了高精度的传输测量可以成为高迁移率系统中高频耗散效应的灵敏探针。
We report an observation of magneto-oscillations in transmittance of the circularly polarized microwave radiation through the high-mobility two-dimensional electron system hosted by a GaAs quantum well. The oscillations reflect an enhanced absorption of radiation at high harmonics of the cyclotron resonance and follow simultaneously measured microwave-induced resistance oscillations (MIRO) in the DC transport. While the relative amplitude (up to 1%) of the transmittance oscillations appears to be small, they represent a significant (greater than 50%) modulation of the absorption coefficient. The analysis of obtained results demonstrates that the low-decay, magnitude, and polarization dependence of the transmittance oscillations accurately follow the theory describing photon-assisted scattering between distant disorder-broadened Landau levels. The extracted sample parameters describe reasonably well the concurrently measured MIRO. Our results provide insight into the MIRO polarization immunity problem and demonstrate that high-precision transmission measurements can be a sensitive probe of high-frequency dissipative effects in high-mobility systems.
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