Vibrationally induced flip motion of a hydroxyl dimer on Cu(110)
arXiv:1111.2252 · doi:10.1103/PhysRevB.84.193403
Abstract
Recent low-temperature scanning-tunneling microscopy experiments [T. Kumagai et al., Phys. Rev. B 79, 035423 (2009)] observed the vibrationally induced flip motion of a hydroxyl dimer (OD)2 on Cu(110). We propose a model to describe two-level fluctuations and current-voltage characteristics of nanoscale systems which undergo vibrationally induced switching. The parameters of the model are based on comprehensive density-functional calculations of the system's vibrational properties. For the dimer (OD)2 the calculated population of the high and low conductance states, the I-V, dI/dV, and d2I/dV2 curves are in good agreement with the experimental results and underlines the different roles played by the free and shared OD stretch modes of the dimer.
5 pages, 4 figures
References in corpus (6)
- Inelastic transport theory from first-principles: methodology and applications for nanoscale devices
- Modeling inelastic phonon scattering in atomic- and molecular-wire junctions
- Vibrationally Induced Two-Level Systems in Single-Molecule Junctions
- Huge negative differential conductance in Au-H2 molecular nanojunctions
- Bistable hysteresis and resistance switching in hydrogen gold junctions
- Atomic Motion in Single H and D Molecule Junction Induced by Phonon Excitation