标题： 电子在磁场中六族二卤化物中的格林函数 显示英文标题

标题： Green's functions of electrons in group-VI dichalcogenides in a magnetic field

摘要： 含有磁场的VI族二卤化物中电子的定态二维薛定谔方程的格林函数的闭合表达式是用Whittaker函数表示的。所得的格林函数算子是一个~$8 \times 8$矩阵，由四个块对角~$2\times 2$矩阵组成，每个矩阵由不同的谷指数和电子自旋值所表征。所得结果用于在最低玻恩近似下计算中性点状杂质在磁场存在下引起的局域态密度。空间电子密度随着与杂质距离的变化而出现类似弗里德尔的振荡或指数衰减。 显示英文摘要

摘要： Closed expression for the Green's function of the stationary two-dimensional Schrodinger equation for an electron in group-VI dichalcogenides in the presence of a magnetic field is obtained in terms of the Whittaker functions. The resulting Green's function operator is a~$8 \times 8$ matrix consisting of four block-diagonal~$2\times 2$ matrices, each of them characterized by different values of valley index and electron spin. The obtained results are used to calculate local density of states induced by a neutral delta-like impurity in the presence of a magnetic field within the lowest Born approximation. The spatial electron density experiences either the Friedel-like oscillations or an exponential decay as a function of the distance from the impurity.