We report on nonlinear magnetotransport in a two-dimensional electron gas hosted in a MgZnO/ZnO heterostructure. Upon application of a direct current, we observe pronounced Hall field-induced resistance oscillations (HIRO) which are well known from experiments on high-mobility GaAs/AlGaAs quantum wells. The unique sensitivity of HIRO to the short-range component of the disorder potential allows us to unambiguously establish that the mobility of our MgZnO/ZnO heterostructure is limited by impurities residing within or near the 2D channel. Demonstration that HIRO can be realized in a system with a much lower mobility, much higher density, and much larger effective mass than in previously studied systems, highlights remarkable universality of the phenomenon and its great promise to be used in studies of a wide variety of emerging 2D materials.
Enhanced quantum oscillatory magnetization and non-equilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers
Quantised conductance of one-dimensional strongly-correlated electrons in an oxide heterostructure
氧化物异质结构是研究和创造新型功能纳米结构的通用平台。我们成功地在MgZnO/ZnO异质结构上利用量子点接触开发了一维量子线器件，并观察到了弹道电子输运，电导以2 e ^{2}/h为单位量化。使用直流偏置和面内场测量，我们发现，g因子增强到6.8左右，超过三倍的值在散装氧化锌。我们发现，有效质量m^{*}随着电子密度的降低而增加，这是由于强的电子-电子相互作用。在这个强相互作用的1D系统中，我们研究的功能匹配的0.7电导异常的第五子带。本文表明，高迁移率氧化物异质结构，如这可以提供良好的替代传统的III-V族半导体在自旋电子学和量子计算，因为他们没有不可避免的从核自旋退相。这为量子位的开发铺平了道路，量子位受益于未掺杂异质结构的低缺陷以及硅中可实现的长自旋寿命。
Plasmon exciton coupling enhances second order nonlinear response in borophene ZnO hybrid structures
Institute of Experimental and Applied Physics, Kiel University（基尔大学实验与应用物理研究所）；Department of Physics, University of Tehran（德黑兰大学物理系）；Kiel Nano, Surface, and Interface Science KiNSIS, Kiel University（基尔大学基尔纳米、表面与界面科学(KiNSIS)）
Origin and Reduction of Coercive Fields in ZnO-based Wurtzite Ferroelectrics
Bredesen Center for Interdisciplinary Research, University of Tennessee（田纳西大学布雷德森跨学科研究中心）；Center for Nanophase Materials Sciences, Oak Ridge National Laboratory（橡树岭国家实验室纳米材料科学中心）；Department of Mechanical Engineering, The Pennsylvania State University（宾夕法尼亚州立大学机械工程系）；Department of Materials Science and Engineering, The Pennsylvania State University（宾夕法尼亚州立大学材料科学与工程系）
