论文标题
消失在二维孔气中
Vanishing Zeeman energy in a two-dimensional hole gas
论文作者
论文摘要
在紧张的锗二维孔气体的Landau粉丝图中观察到了Zeeman分裂状态交叉的明显签名。基于扰动模型讨论了基本机制，该模型为临界磁场提供了封闭公式。这些磁场在很大程度上取决于最高价和相邻价带之间的能量差，并且对量子井厚度，应变和自旋轨道相互作用敏感。后者是交叉发生的必要特征。该框架可以直接从简单的测量中对孔状态参数进行直接量化，从而为其在基于孔的量子设备的设计和建模中铺平了道路。
A clear signature of Zeeman split states crossing is observed in 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 top-most and the 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 modelling of hole-based quantum devices.
