Voltage-Controlled Binary Conductance Switching in Gold-4,4'-Bipyridine-Gold Single-Molecule Nanowires.

Voltage-Controlled Binary Conductance Switching in Gold-4,4'-Bipyridine-Gold Single-Molecule Nanowires.
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DOI:
10.1021/acs.jpclett.0c02185
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发表时间:
2020-10-01
期刊:
The journal of physical chemistry letters
影响因子:
--
通讯作者:
Halbritter A
Halbritter A
中科院分区:
其他
文献类型:
--
作者:
Mezei G;Balogh Z;Magyarkuti A;Halbritter A

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采用机械可控断裂结技术,在低温(T = 4.2K)下研究了金-4,4 ′-联吡啶-金单分子结.我们观察到的两个分子结合配置之间的概率电导切换,同时受到机械驱动和所施加的电压。我们表明,两个电导状态的相对优势是可调的电极位移,而电压操纵引起的两个开关时间的指数加速。电压可调开关速率的详细调查提供了一个洞察可能的开关机制。
We investigate gold–4,4′-bipyridine–gold single-molecule junctions with the mechanically controllable break junction technique at cryogenic temperature (T = 4.2 K). We observe bistable probabilistic conductance switching between the two molecular binding configurations, influenced both by the mechanical actuation and by the applied voltage. We demonstrate that the relative dominance of the two conductance states is tunable by the electrode displacement, whereas the voltage manipulation induces an exponential speedup of both switching times. The detailed investigation of the voltage-tunable switching rates provides an insight into the possible switching mechanisms.
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