论文标题
高磁场旋转valley-split shubnikov-de haas振荡在wse $ _2 $单层
High magnetic field spin-valley-split Shubnikov-de Haas oscillations in a WSe$_2$ monolayer
论文作者
论文摘要
我们在非常高的磁场下研究了P型WSE $ _2 $单层中的Shubnikov-de Haas振荡。在非溶解的Landau级别中，振荡模式由于旋转和山谷的分裂很大而复杂。我们的实验数据可以通过模型复制，其中主要参数是Zeeman Energy与Cyclotron Energy之间的比率。该模型考虑了两个山谷的Landau水平，并具有相同的高斯宽片，这允许预测源自每个山谷的电阻振荡的相对幅度。发现Zeeman能量比回旋子能量大几倍。随着孔密度的降低，在较低的载流子密度下报告的值的连续性中，它转化为较大且增加的有效兰德因子。
We study Shubnikov-de Haas oscillations in a p-type WSe$_2$ monolayer under very high magnetic field. The oscillation pattern is complex due to a large spin and valley splitting, in the non-fully-resolved Landau level regime. Our experimental data can be reproduced with a model in which the main parameter is the ratio between the Zeeman energy and the cyclotron energy. The model takes into account the Landau levels from both valleys with the same Gaussian broadening, which allows to predict the relative amplitude of the resistance oscillation originating from each valley. The Zeeman energy is found to be several times larger than the cyclotron energy. It translates into a large and increasing effective Landé factor as the hole density decreases, in the continuity of the values reported in the literature at lower carrier density.
