Coherent electron-phonon coupling and polaron-like transport in molecular wires

Details Coherent electron-phonon coupling and polaron-like transport in molecular wires Coherent electron-phonon coupling and polaron-like transport in molecular wires

2000-08-22

arxiv.org/abs/cond-mat/0008317v3

Physics

Condensed Matter

21 pages, 8 figures, accepted for publication in Phys. Rev. B (to appear march 2001)

Scientific paper

10.1103/PhysRevB.63.125422

We present a technique to calculate the transport properties through one-dimensional models of molecular wires. The calculations include inelastic electron scattering due to electron-lattice interaction. The coupling between the electron and the lattice is crucial to determine the transport properties in one-dimensional systems subject to Peierls transition since it drives the transition itself. The electron-phonon coupling is treated as a quantum coherent process, in the sense that no random dephasing due to electron-phonon interactions is introduced in the scattering wave functions. We show that charge carrier injection, even in the tunneling regime, induces lattice distortions localized around the tunneling electron. The transport in the molecular wire is due to polaron-like propagation. We show typical examples of the lattice distortions induced by charge injection into the wire. In the tunneling regime, the electron transmission is strongly enhanced in comparison with the case of elastic scattering through the undistorted molecular wire. We also show that although lattice fluctuations modify the electron transmission through the wire, the modifications are qualitatively different from those obtained by the quantum electron-phonon inelastic scattering technique. Our results should hold in principle for other one-dimensional atomic-scale wires subject to Peierls transitions.

Affiliated with

Also associated with

No associations

Rating

Coherent electron-phonon coupling and polaron-like transport in molecular wires does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coherent electron-phonon coupling and polaron-like transport in molecular wires, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coherent electron-phonon coupling and polaron-like transport in molecular wires will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-133944