Renormalization of the Effective Electron Mass Governing the Period of Microwave-Induced Resistance Oscillations in ZnO/MgZnO Heterojunctions
Renormalization of the Effective Electron Mass Governing the Period of Microwave-Induced Resistance Oscillations in ZnO/MgZnO Heterojunctions
复制标题
控制 ZnO/MgZnO 异质结中微波诱导电阻振荡周期的有效电子质量的重整化
DOI：
10.1134/s0021364018120135
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发表时间：
2018
期刊：
影响因子：
1.3
通讯作者：
I. Kukushkin
中科院分区：
文献类型：
--
作者：
A. Shchepetilnikov;Y. Nefyodov;A. Dremin;I. Kukushkin
研究了一系列二维电子密度n不同的ZnO/MgZnO异质结的微波感应磁电阻振荡现象。据发现，有效电子质量m* 确定从微波诱导的磁阻振荡的周期基本上取决于这个参数。对于高密度，m* 的值倾向于体ZnO中的有效电子质量，而对于低密度，m* 显著增加，变得比电子回旋质量大得多。实验结果给出了明确的证据，电子-电子相互作用的微波感应磁阻振荡的显着影响。
The phenomenon of microwave-induced magnetoresistance oscillations is studied in a series of ZnO/MgZnO heterojunctions characterized by different two-dimensional electron densities n. It is found that the effective electron mass m* determined from the period of microwave-induced magnetoresistance oscillations depends essentially on this parameter. For high densities, the value of m* tends to the effective electron mass in bulk ZnO, while for low densities, m* increases pronouncedly and becomes considerably larger than the electron cyclotron mass. The experimental results give clear evidence of a significant impact of the electron–electron interaction on microwave-induced magnetoresistance oscillations.