Inelastic quantum transport: the self-consistent Born approximation and correlated electron-ion dynamics - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




Inelastic quantum transport: the self-consistent Born approximation and correlated electron-ion dynamics - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: A dynamical method for inelastic transport simulations in nanostructures iscompared with a steady-state method based on non-equilibrium Green-s functions.A simplified form of the dynamical method produces, in the steady state in theweak-coupling limit, effective self-energies analogous to those in the BornApproximation due to electron-phonon coupling. The two methods are thencompared numerically on a resonant system consisting of a linear trimer weaklyembedded between metal electrodes. This system exhibits enhanced heating athigh biases and long phonon equilibration times. Despite the differences intheir formulation, the static and dynamical methods capture localcurrent-induced heating and inelastic corrections to the current with goodagreement over a wide range of conditions, except in the limit of very highvibrational excitations, where differences begin to emerge.



Author: Eunan J. McEniry, Thomas Frederiksen, Tchavdar N. Todorov, Daniel Dundas, Andrew P. Horsfield

Source: https://arxiv.org/







Related documents