论文标题
过渡金属二分法中的质量重质化
Mass Renormalization in Transition Metal Dichalcogenides
论文作者
论文摘要
结果表明，过渡金属二分法中的三倍旋转对称性导致库仑在布里渊区的$ k $点附近的有效电子和孔质量的重新归一化。重新规范化的大小取决于介电配置。有效的激子质量$ m = 0.4 m_0 $的自由悬挂的MOS $ _2 $单层更改为$ m = 0.35 m_0 $，并带有HBN封装。质量重归于增加激子结合能，并降低激子磁管变速和回旋频率。与激发磁管变位的高场测量的详细比较显示出极好的一致性。
It is shown that the three-fold rotational symmetry in transition metal dichalcogenides leads to a Coulomb induced renormalization of the effective electron and hole masses near the $K$-points of the Brillouin zone. The magnitude of the renormalization depends on the dielectric configuration. The effective exciton mass $m=0.4 m_0$ of a freely suspended MoS$_2$ monolayer changes to $m= 0.35 m_0$ with hBN encapsulation. The mass renormalization increases the excitonic binding energy and reduces the exciton diamagnetic shift and cyclotron frequency. Detailed comparisons with high field measurements of the excitonic diamagnetic shift show excellent agreement.
