Resonant tunneling and Fano resonance in quantum dots with electron-phonon interaction

Details Resonant tunneling and Fano resonance in quantum dots with electron-phonon interaction Resonant tunneling and Fano resonance in quantum dots with electron-phonon interaction

2006-01-16

arxiv.org/abs/cond-mat/0601327v2

Phys. Rev. B Vol. 73, 235353 (2006).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

28 pages, 11 figures

Scientific paper

10.1103/PhysRevB.73.235353

We theoretically study the resonant tunneling and Fano resonance in quantum dots with electron-phonon (e-ph) interaction. We examine the bias-voltage ($V$) dependence of the decoherence, using Keldysh Green function method and perturbation with respect to the e-ph interaction. With optical phonons of energy $\omega_0$, only the elastic process takes place when $eV<\omega_0$, in which electrons emit and absorb phonons virtually. The process suppresses the resonant amplitude. When $eV>\omega_0$, the inelastic process is possible which is accompanied by real emission of phonons. It results in the dephasing and broadens the resonant width. The bias-voltage dependence of the decoherence cannot be obtained by the canonical transformation method to consider the e-ph interaction if its effect on the tunnel coupling is neglected. With acoustic phonons, the asymmetric shape of the Fano resonance grows like a symmetric one as the bias voltage increases, in qualitative accordance with experimental results.

Affiliated with

Also associated with

No associations

Rating

Resonant tunneling and Fano resonance in quantum dots with electron-phonon interaction 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 Resonant tunneling and Fano resonance in quantum dots with electron-phonon interaction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resonant tunneling and Fano resonance in quantum dots with electron-phonon interaction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-523934