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arXiv · 2006.04460

Voltage-controlled binary conductance switching in gold-4,4'-bipyridine-gold single-molecule nanowires

Gréta Mezei·Zoltán Balogh·András Magyarkuti·András Halbritter
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Abstract

We investigate gold-4,4'-bipyridine-gold single-molecule junctions with the mechanically controllable break junction technique at cryogenic temperature ($T=4.2\,\text{K}$). We observe bistable probabilistic conductance switching between the two molecular binding configurations, influenced both by the mechanical actuation, and 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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Gréta Mezei, Zoltán Balogh, András Magyarkuti, András Halbritter. 2020-06-08. Voltage-controlled binary conductance switching in gold-4,4'-bipyridine-gold single-molecule nanowires. https://doi.org/10.1021/acs.jpclett.0c02185

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