Electronic friction in interacting systems

Abstract

We consider effects of strong light-matter interaction on electronic friction in molecular junctions within generic model of single molecule nano cavity junction. Results of the Hubbard NEGF simulations are compared with mean-field NEGF and generalized Head-Gordon and Tully approaches. Mean-field NEGF is shown to fail qualitatively at strong intra-system interactions, while accuracy of the generalized Head-Gordon and Tully results is restricted to situations of well separated intra-molecular excitations, when bath induced coherences are negligible. Numerical results show effects of bias and cavity mode pumping on electronic friction. We demonstrate non-monotonic behavior of the friction on the bias and intensity of the pumping field and indicate possibility of engineering friction control in single molecule junctions.

19 pages, 4 figures

References in corpus (7)

• Scattering theory of current-induced forces in mesoscopic systems
• Current-induced atomic dynamics, instabilities, and Raman signals: Quasi-classical Langevin equation approach
• Ab-initio tensorial electronic friction for molecules on metal surfaces: nonadiabatic vibrational relaxation
• Laser-like vibrational instability in rectifying molecular conductors
• Scattering theory of adiabatic reaction forces due to out-of-equilibrium quantum environments
• Current-induced forces and hot-spots in biased nano-junctions
• Nonequilibrium diagrammatic technique for Hubbard Green functions