论文标题
带有碱金属的多层MOS $ _2 $的范德华系数
van der Waals coefficients of the multi-layered MoS$_2$ with alkali metals
论文作者
论文摘要
研究了范德华的系数和依赖性的延迟功能，在多层过渡金属钼二硫化物（MOS $ _2 $）二甲藻元中与碱原子的原子薄膜之间相互作用的相互作用函数。首先，我们确定 频率依赖性的介电介电常数和MOS $ _2 $不同层的固有载体密度值通过对Yu及其同事报告的最近测量的光学数据采用各种拟合模型[SCI。使用光谱椭圆测量法{\ bf 5}，16996（2015）。然后，通过采用相对论耦合群集理论，可以非常准确地评估碱原子的动态电偶极极化。我们还证明了上述系数的显式变化对于不同数量的层。这些研究对于使用分层MOS $ _2 $的光电，传感和存储应用非常有用。
The van der Waals coefficients and the separation dependent retardation functions of the interactions between the atomically thin films of the multi-layered transition metal molybdenum disulfide (MoS$_2$) dichalcogenides with the alkali atoms are investigated. First, we determine the frequency-dependent dielectric permittivity and intrinsic carrier density values for different layers of MoS$_2$ by adopting various fitting models to the recently measured optical data reported by Yu and co-workers [Sci. Rep. {\bf 5}, 16996 (2015)] using spectroscopy ellipsometry. Then, dynamic electric dipole polarizabilities of the alkali atoms are evaluated very accurately by employing the relativistic coupled-cluster theory. We also demonstrate the explicit change in the above coefficients for different number of layers. These studies are highly useful for the optoelectronics, sensing and storage applications using layered MoS$_2$.
