Insulator-metal transition in biased finite polyyne systems
- 69 Downloads
A method for the study of the electronic transport in strongly coupled electron-phonon systems is formalized and applied to a model of polyyne chains biased through metallic Au leads. We derive a stationary non equilibrium polaronic theory in the general framework of a variational formulation. The numerical procedure we propose can be readily applied if the electron-phonon interaction in the device hamiltonian can be approximated as an effective single particle electron hamiltonian. Using this approach, we predict that finite polyyne chains should manifest an insulator-metal transition driven by the non-equilibrium charging which inhibits the Peierls instability characterizing the equilibrium state.
PACS63.22.-m Phonons or vibrational states in low-dimensional structures and nanoscale materials 64.70.Nd Structural transitions in nanoscale materials 73.63.-b Electronic transport in nanoscale materials and structures
Unable to display preview. Download preview PDF.