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

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.

References in corpus (11)

• Formation and manipulation of a metallic wire of single gold atoms
• Mechanically-Controlled Binary Conductance Switching of a Single-Molecule Junction
• Inelastic transport theory from first-principles: methodology and applications for nanoscale devices
• p-Bits for Probabilistic Spin Logic
• Field-induced Conductance Switching by Charge-state Alternation in Organometallic Single-Molecule Junctions
• Calibration of the length of a chain of single gold atoms
• Single atom adhesion in optimized gold nanojunctions
• Huge negative differential conductance in Au-H2 molecular nanojunctions
• Unsupervised feature recognition in single molecule break junction data
• Slow two-level systems in point contacts
• Temporal correlations and structural memory effects in break junction measurements