论文标题
任意紧密结合的哈密顿人的散射矩阵
Scattering matrix of arbitrary tight-binding Hamiltonians
论文作者
论文摘要
提出了一种计算任意紧密结合哈密顿量的散射矩阵（SM）的新型有效方法，包括具有多性结构的病例。特别是，给出了两种基本结构的SM，可用于迭代地获得较大系统的SM。同样，描述了获得层组成的周期性引线的SM的程序。这种方法允许重新规定的方法，该方法允许在宏观长度系统上进行计算，而无需引入其他近似值。最后，计算了环形多性系统的传输系数和具有较小宽度区域的方形纳米替比的传输功能。
A novel efficient method to calculate the scattering matrix (SM) of arbitrary tight-binding Hamiltonians is proposed, including cases with multiterminal structures. In particular, the SM of two kind of fundamental structures are given, which can be used to obtain the SM of bigger systems iteratively. Also, a procedure to obtain the SM of layer-composed periodic leads is described. This method allows renormalization approaches, which permits computations over macroscopic length systems without introducing additional approximations. Finally, the transmission coefficient of a ring-shaped multiterminal system and the transmission function of a square-lattice nanoribbon with a reduced width region are calculated.
