arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2010.00510cond-mat.mes-hallcond-mat.mtrl-scicond-mat.str-el
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WSe $_2$单层膜中强磁场自旋谷分裂Shubnikov-de Haas振荡

High magnetic field spin-valley-split Shubnikov-de Haas oscillations in a WSe$_2$ monolayer

Banan Kerdi, Mathieu Pierre, Robin Cours, Bénédicte Warot-Fonrose, Michel Goiran, Walter Escoffier

摘要:

我们研究了在很高的磁场下p型WSe $_2$单分子膜中的Shubnikov-de Haas振荡。振荡模式是复杂的,由于一个大的自旋和谷分裂,在非完全解决朗道能级制度。我们的实验数据可以用一个主要参数是塞曼能量和回旋能量之比的模型来再现。该模型考虑到朗道水平从两个山谷具有相同的高斯加宽,这允许预测的相对振幅的电阻振荡起源于每个山谷。塞曼能量被发现是几倍大于回旋能量。它转化为一个大的和增加的有效Landé因子的空穴密度降低,在文献中报道的值在较低的载流子密度的连续性。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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