Nonconservative dynamics in long atomic wires

Abstract

The effect of nonconservative current-induced forces on the ions in a defect-free metallic nanowire is investigated using both steady-state calculations and dynamical simulations. Non-conservative forces were found to have a major influence on the ion dynamics in these systems, but their role in increasing the kinetic energy of the ions decreases with increasing system length. The results illustrate the importance of nonconservative effects in short nanowires and the scaling of these effects with system size. The dependence on bias and ion mass can be understood with the help of a simple pen and paper model. This material highlights the benefit of simple preliminary steady-state calculations in anticipating aspects of brute-force dynamical simulations, and provides rule of thumb criteria for the design of stable quantum wires.

20 pages, 8 figures

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Cited by in corpus (8)

• Current-induced forces and hot-spots in biased nano-junctions
• Non-adiabatic dynamics of electrons and atoms under non-equilibrium conditions
• Emergence of negative viscosities and colored noise under current-driven Ehrenfest molecular dynamics
• Current-induced runaway vibrations in dehydrogenated graphene nanoribbons
• Current-induced forces in single-resonance systems
• Hysteresis and effective reciprocity breaking due to current-induced forces
• Phonon and magnon jets above the critical current in nanowires with planar domain walls
• Length matters: keeping atomic wires in check