广义Fibonacci准周期系统(双生子模型)能谱性质的格林函数—重整化群研究

Study on the Spectral Properties of a Kind of Generalized Fibonacci Quasiperiodic System

本文利用格林函数——重整化群方法数值研究了一种广义Fibonacci 准周期系统(双生子模型)的能谱性质。结果发现,在E=0附近,电子态密度连续变化,即表现出周期系统的性质,这不同于Fibonacci 链的情况。至于声子谱,则表现出与Fibonacci 链相同的性质。

In this paper,the spectral properties of a kind of generalizedFibonacci quasiperiodic system(Twin model)have been studied using theGreen's function-Renormalization group(GF—RG)method.It's shown thatthe spectra of this system are similar with the Fibonacci chain,apart fromthe continuous behaviour in the central part of the electronic spectrum.