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arXiv 0806.1574cond-mat.mes-hallcond-mat.dis-nn
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梯形网络作为介观开关的精确结果

Ladder network as a mesoscopic switch: An exact result

Shreekantha Sil, Santanu K. Maiti, Arunava Chakrabarti

摘要:

我们研究了紧束缚梯形网络作为介观开关器件的可能性。讨论了原子势的任意一个或两个阶梯臂可以呈现随机、有序或准周期分布的几种情况。我们表明,对于一个特殊的选择的哈密顿参数,它是可能的证明正是在这样一个系统中的流动性边缘的存在,其中起着核心作用的开关动作。我们还提出了数值计算结果的两端电导的一般模型的准周期性生长的梯子,支持在这样的网络中的电子状态的一般特征。这一分析结果对介观或DNA开关器件的制备有一定的指导意义。

英文摘要:

We investigate the possibilities of a tight binding ladder network as a mesoscopic switching device. Several cases have been discussed in which any one or both the arms of the ladder can assume random, ordered or quasiperiodic distribution of atomic potentials. We show that, for a special choice of the Hamiltonian parameters it is possible to prove exactly the existence of mobility edges in such a system, which plays a central role in the switching action. We also present numerical results for the two-terminal conductance of a general model of a quasiperiodically grown ladder which support the general features of the electron states in such a network. The analysis might be helpful in fabricating mesoscopic or DNA switching devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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