科研之友
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摘要
Based on the analysis of a one-dimensional tight-binding chain subject to random interactions from disordered side sites, a possible picture for the disorder-enhanced conductivity for nanowires is provided. Opposite to the physical intuition that the conduction of a quantum wire gets poorer when the disorder of the side sites increases, the conduction of the wire improves after the disorder of the environment surpasses a critical value. The reason is that the number of effective localized disordered states that can strongly scatter the conduction states in the quantum wire decreases with the increase of the environmental disorder.
- 出版日期2007-10
- 单位北京师范大学
