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arXiv 0904.1940cond-mat.mes-hall
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磁场控制薄圆柱中的电子输运

Magnetic field controlled electron transport in a thin cylinder

Santanu K. Maiti

摘要:

我们探讨了在纵向和横向磁通量的存在下,附着在两个半无限大的一维金属电极上的薄圆柱体中的电子输运输运。一个简单的紧束缚模型被用来描述系统,其中所有的计算都是在格林函数形式主义。非常令人惊讶的是,观察到,典型的电流振幅振荡作为横向磁通量的函数,与电导-能量特性相关联,显示$Nϕ_0$通量量子周期性,其中$N$和$ϕ_0$ $(=ch/e)$分别对应于系统尺寸和基本通量量子。该分析可能有助于制造介观开关器件,其中可以通过调整系统尺寸$N$来延迟特定的响应。

英文摘要:

We explore electron transport in a thin cylinder, attached to two semi-infinite one-dimensional metallic electrodes, in the presence of both longitudinal and transverse magnetic fluxes. A simple tight-binding model is used to describe the system, where all the calculations are performed in the Green's function formalism. Quite surprisingly it is observed that, typical current amplitude oscillates as a function of the transverse magnetic flux, associated with conductance-energy characteristics, showing $Nϕ_0$ flux-quantum periodicity, where $N$ and $ϕ_0$ $(=ch/e)$ correspond to the system size and elementary flux-quantum respectively. The analysis might be helpful in fabricating mesoscopic switching devices, where a particular response can be delayed by tuning the system size $N$.

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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