摘要
We numerically investigate the normalized localization length of two-side rough nanowires as functions of energy,magnetic field and correlation strength by using modular recursive Green's function method.It is found that in the absence of correlation,while in the presence of magnetic field,the localization length increases linearly for two-side roughness,which is different to diverging exponentially for one-side roughness.Moreover,the localization of electrons is suppressed in the low energy region,but enhanced in the high energy region.In the presence of correlation,especially,an exponential enhancement in the localization length resumes in high energy region,in contrast to that in low energy region,the long-range correlations abnormally enhance the localization of electrons.A competitive mechanism is proposed to explain this behavior.
作者
ZHAO Wei
DING Jian-Wen
赵为;丁建文(Department of Physics&Institute for Nanophysics and Rare-earth Luminescence,Xiangtan University,Xiangtan 411105)
基金
Supported by the National Natural Science Foundation of China under Grant No.10674113
the Foundation for the Author of National Excellent Doctoral Dissertation of China under Grant No.200726.
作者简介
赵为,Email:zhaowei@xtu.edu.cn。
