Aharonov-Bohm-type effect in graphene tubules: A Landauer approach.
Aharonov-Bohm-type effect in graphene tubules: A Landauer approach.
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DOI：
10.1103/physrevb.49.5097
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发表时间：
1994-02
期刊：
影响因子：
--
通讯作者：
Weidong Tian;S. Datta
中科院分区：
文献类型：
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作者：
Weidong Tian;S. Datta
本文证明：(1)对于石墨烯管材，轴向磁场可以在零偏压下周期性地诱导半金属-半导体相变。这是一种Aharonov-Bohm类型的效应，通常适用于细圆柱导体；(2)Landauer方法可以用来估计通过扫描隧道探头测量的单个管子的电导，它是外加偏置、温度、管子几何因素和磁场的函数。数值计算表明，即使在室温下也能观察到电导调制。
In this paper we show that (1) for graphene tubules an axial magnetic field can induce a semimetal-semiconductor transition periodically at zero bias. This is an Aharonov-Bohm-type effect and is generally true for thin cylindrical conductors; (2) the Landauer approach can be used to estimate the conductance of individual tubules measured by scanning tunneling probes as a function of applied bias, temperature, tubule geometric factors, and magnetic field. Numerical calculations are presented showing that the conductance modulation should be observable even at room temperature.