title: Coupled electron-phonon transport from molecular dynamics with quantum baths.
abstract: Based on generalized quantum Langevin equations for the tight-binding wavefunction amplitudes and lattice displacements, electron and phonon quantum transport are obtained exactly using molecular dynamics (MD) in the ballistic regime. The electron-phonon interactions can be handled with a quasi-classical approximation. Both charge and energy transport and their interplay can be studied. We compare the MD results with those of a fully quantum mechanical nonequilibrium Green's function (NEGF) approach for the electron currents. We find a ballistic to diffusive transition of the electron conduction in one-dimensional chains as the chain length increases.
authors.forename: J T
authors.initials: JT
authors.lastname: Lü
authors.forename: Jian-Sheng
authors.initials: JS
authors.lastname: Wang