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首页> 外文期刊>Physica, B. Condensed Matter >Shuttle instability in self-assembled Coulomb blockade nanostructures
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Shuttle instability in self-assembled Coulomb blockade nanostructures

机译:自组装库仑封锁纳米结构中的航天飞机不稳定性

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摘要

We study a simple model of a self-assembled, room temperature Coulomb-blockade nanostructure containing a metallic nanocrystal or grain connected by soft molecular links to two metallic electrodes. Self-excitation of periodic grain vibrations at 10-100 GHz is shown to be possible for a sufficiently large bias voltage leading to a novel 'shuttle mechanism' of discrete charge transfer and a current through the nanostructure proportional to the vibration frequency. For the case of weak electromechanical coupling an analytical approach is developed which together with Monte Carlo simulations shows that the shuttle instability for structures with high junction resistances leads to hysteresis in the current-voltage characteristics. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 10]
机译:我们研究了一个自组装的,室温下的库仑阻塞纳米结构的简单模型,该结构包含通过软分子链接连接到两个金属电极的金属纳米晶体或晶粒。对于足够大的偏置电压,导致出现10-100 GHz的周期性晶粒振动自激是可能的,这会导致离散电荷转移的新颖“穿梭机制”以及通过纳米结构的电流与振动频率成比例。对于弱机电耦合的情况,开发了一种分析方法,该方法与蒙特卡洛模拟一起表明,具有高结电阻的结构的穿梭不稳定性会导致电流-电压特性出现滞后。 (C)1998 Elsevier Science B.V.保留所有权利。 [参考:10]

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