推广的SSH哈密顿及其孤子解

Generalized SSH Hamiltonian and Its Soliton Solution

使用紧束缚近似方法推导出推广的ＳＳＨ哈密顿，比Ｄａｖｙｄｏｖ孤子的哈密顿多了一个表现电子近邻跳跃与晶格振动的耦合项，随后使用数值方法计算非线性方程的孤子解。对一些材料，与Ｄａｖｙｄｏｖ孤子解一致，对另一些材料，则产生不同程度的变形。

The generalized SSH Hamiltonian is derived.It is shown that a term arisingfrom the coupling between lattice vibration and electron hopping is missing in theDavydov's Hamiltonian. We obtain the soliton solution of a Hamiltonian including thisterm. The results show that this term have different effect in different metarials.