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首页> 外文期刊>Physical review letters >Non-Ohmic Variable-Range Hopping Transport in One-Dimensional Conductors
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Non-Ohmic Variable-Range Hopping Transport in One-Dimensional Conductors

机译:一维导体的非欧姆变距跳跃传输

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摘要

We investigate theoretically the effect of a finite electric field on the resistivity of a disordered one-dimensional system in the variable-range hopping regime. We find that at low fields the transport is inhibited by rare fluctuations in the random distribution of localized states that create high-resistance breaks in the hopping network. As the field increases, the breaks become less resistive. In strong fields the breaks are overrun and the electron distribution function is driven far from equilibrium. The logarithm of the resistance initially shows a simple exponential drop with the field, followed by a logarithmic dependence, and finally, by an inverse square-root law.
机译:从理论上讲,我们研究了有限电场对无序一维系统在变程跳频中的电阻率的影响。我们发现,在低场中,传输受到局部状态随机分布中罕见的波动的抑制,该波动在跳频网络中产生高电阻中断。随着磁场的增加,断裂电阻变小。在强场中,断裂超限,并且电子分布函数远离平衡。电阻的对数最初显示出随磁场的简单指数下降,然后是对数相关性,最后是平方根反比定律。

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