Extended states in disordered systems: Role of off-diagonal correlations
Extended states in disordered systems: Role of off-diagonal correlations
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DOI：
10.1103/physrevb.69.153203
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发表时间：
2004-03
影响因子：
3.7
通讯作者：
Wei Zhang;S. Ulloa
中科院分区：
文献类型：
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作者：
Wei Zhang;S. Ulloa
我们研究了具有随机对角线无序但非对角线短程关联的一维系统。我们发现，这些关联为有限系统提供了有效的传导通道。在一定的跳跃幅度的黄金关联条件下，我们发现了无限大系统的一个扩张态。我们的模型对DNA分子中的电荷输运具有重要的意义，并提出了一组可能的半导体超晶格实验来验证我们最有趣的理论预测。
We study one-dimensional systems with random diagonal disorder but off-diagonal short-range correlations imposed by structural constrains. We find that these correlations generate effective conduction channels for finite systems. At a certain golden correlation condition for the hopping amplitudes, we find an extended state for an infinite system. Our model has important implications to charge transport in DNA molecules, and a possible set of experiments in semiconductor superlattices is proposed to verify our most interesting theoretical predictions.