arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0904.2651cond-mat.mes-hallcond-mat.dis-nn
收藏

非对称Chalker-Coddington网络模型中的点接触电导

Point-Contact Conductance in Asymmetric Chalker-Coddington Network Model

Koji Kobayashi, Tomi Ohtsuki, Keith Slevin

摘要:

研究了具有理想导电沟道的无序二维电子系统的输运性质。我们引入了一个非对称的Chalker-Coddington网络模型,并对点接触电导进行了数值研究。我们发现,该模型中的电导的行为是完全不同的对称模型。即使在一个大的接触之间的距离的限制,我们发现一个广泛的分布的电导和非平凡的幂律依赖的平均电导的系统宽度。我们的研究结果适用于系统,如锯齿形石墨烯纳米带,其中左去和右去通道的数量是不同的。

英文摘要:

We study the transport properties of disordered two-dimensional electron systems with a perfectly conducting channel. We introduce an asymmetric Chalker-Coddington network model and numerically investigate the point-contact conductance. We find that the behavior of the conductance in this model is completely different from that in the symmetric model. Even in the limit of a large distance between the contacts, we find a broad distribution of conductance and a non-trivial power law dependence of the averaged conductance on the system width. Our results are applicable to systems such as zigzag graphene nano-ribbons where the numbers of left-going and right-going channels are different.

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。

↑