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- W3168307462 abstract "Understanding current-induced bond rupture in single-molecule junctions is both of fundamental interest and a prerequisite for the design of molecular junctions, which are stable at higher bias voltages. In this work, we use a fully quantum mechanical method based on the hierarchical quantum master equation approach to analyze the dissociation mechanisms in molecular junctions. Considering a wide range of transport regimes, from off-resonant to resonant, non-adiabatic to adiabatic transport, and weak to strong vibronic coupling, our systematic study identifies three dissociation mechanisms. In the weak and intermediate vibronic coupling regime, the dominant dissociation mechanism is stepwise vibrational ladder climbing. For strong vibronic coupling, dissociation is induced via multi-quantum vibrational excitations triggered either by a single electronic transition at high bias voltages or by multiple electronic transitions at low biases. Furthermore, the influence of vibrational relaxation on the dissociation dynamics is analyzed and strategies for improving the stability of molecular junctions are discussed." @default.
- W3168307462 created "2021-06-22" @default.
- W3168307462 creator A5009168627 @default.
- W3168307462 creator A5026462320 @default.
- W3168307462 creator A5041665905 @default.
- W3168307462 creator A5068315026 @default.
- W3168307462 date "2021-06-15" @default.
- W3168307462 modified "2023-10-16" @default.
- W3168307462 title "Unraveling current-induced dissociation mechanisms in single-molecule junctions" @default.
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