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Vanishing Zeeman energy in a two-dimensional hole gas
Physical Review B ( IF 3.7 ) Pub Date : 2020-09-17 , DOI: 10.1103/physrevb.102.115304 P. Del Vecchio , M. Lodari , A. Sammak , G. Scappucci , O. Moutanabbir
Physical Review B ( IF 3.7 ) Pub Date : 2020-09-17 , DOI: 10.1103/physrevb.102.115304 P. Del Vecchio , M. Lodari , A. Sammak , G. Scappucci , O. Moutanabbir
A clear signature of Zeeman split states crossing is observed in a Landau fan diagram of strained germanium two-dimensional hole gas. The underlying mechanisms are discussed based on a perturbative model yielding a closed formula for the critical magnetic fields. These fields depend strongly on the energy difference between the topmost and neighboring valence bands and are sensitive to the quantum well thickness, strain, and spin-orbit interaction. The latter is a necessary feature for the crossing to occur. This framework enables a straightforward quantification of the hole-state parameters from simple measurements, thus paving the way for its use in design and modeling of hole-based quantum devices.
中文翻译:
二维空穴气中消失的塞曼能量
在应变锗二维空穴气体的Landau扇形图中观察到了塞曼分裂态交叉的清晰特征。基于微扰模型讨论了潜在的机制,该模型为临界磁场提供了封闭的公式。这些场强烈地取决于最上面和附近价带之间的能量差,并且对量子阱的厚度,应变和自旋轨道相互作用敏感。后者是发生交叉的必要特征。该框架能够从简单的测量中直接量化空穴状态参数,从而为在基于空穴的量子器件的设计和建模中使用铺平了道路。
更新日期:2020-09-17
中文翻译:
二维空穴气中消失的塞曼能量
在应变锗二维空穴气体的Landau扇形图中观察到了塞曼分裂态交叉的清晰特征。基于微扰模型讨论了潜在的机制,该模型为临界磁场提供了封闭的公式。这些场强烈地取决于最上面和附近价带之间的能量差,并且对量子阱的厚度,应变和自旋轨道相互作用敏感。后者是发生交叉的必要特征。该框架能够从简单的测量中直接量化空穴状态参数,从而为在基于空穴的量子器件的设计和建模中使用铺平了道路。