Laser-like vibrational instability in rectifying molecular conductors

Details Laser-like vibrational instability in rectifying molecular conductors Laser-like vibrational instability in rectifying molecular conductors

2011-03-10

arxiv.org/abs/1103.1990v1

Phys. Rev. Lett. 107, 046801 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.107.046801

We study the damping of molecular vibrations due to electron-hole pair excitations in donor-acceptor(D-A) type molecular rectifiers. At finite voltage additional non-equilibrium electron-hole pair excitations involving both electrodes become possible, and contribute to the stimulated emission and absorption of phonons. We point out a generic mechanism for D-A molecules, where the stimulated emission can dominate beyond a certain voltage due to inverted position of the D and A quantum resonances. This leads to current-driven amplification (negative damping) of the phonons similar to laser-action. We investigate the effect in realistic molecular rectifier structures using first principles calculations.

Affiliated with

Also associated with

No associations

Rating

Laser-like vibrational instability in rectifying molecular conductors 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 Laser-like vibrational instability in rectifying molecular conductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser-like vibrational instability in rectifying molecular conductors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-630693