The effects of non-diagonal disorder and dimensions in low-dimensional disordered electronic system
Song Zhao-Quan, Xu Hui, Li Yan-Feng, Liu Xiao-Liang
中南大学物理学院，长沙 410083
Abstract Based on the negative eigenvalue theory we discuss the non-diagonal disorder and dimensional effects for the electronic structure in low-dimensional disordered systems. The result shows that: It is the non-diagonal disorder and the dimensio nal effect that strongly affects the electronic structure in the low-dimensional disordered system. The non-diagonal disordered mainly shows the changes of the structure and the boundary effects of the particles in the system. From one- dim ensional system to narrow gap one, the number of the electronic bandgap decrease s, the degree of local states increases, and the structure of the energy gap wil l be more complicated.
Key words ：
electronic structure
low-dimensional disordered system
non-diagonal disorder
dimensional effect
Received: 2004-01-09
Published: 2005-05-10
Cite this article:
Song Zhao-Quan,Xu Hui,Li Yan-Feng et al. The effects of non-diagonal disorder and dimensions in low-dimensional disordered electronic system. Acta Phys. Sin., 2005, 54(5): 2198-2201.
URL:
http://wulixb.iphy.ac.cn/CN/Y2005/V54/I5/2198
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2005, Vol. 54 
