Influence of electron-phonon interaction on Fano resonance in Aharonov-Bohm interferometer

Akiko Ueda, Mikio Eto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We theoretically study the effect of electron-phonon (e-ph) interaction on a Fano resonance in an Aharonov-Bohm interferometer with an embedded quantum dot. We examine the bias-voltage (V) dependence of the decoherence, using Keldysh Green function method and perturbation with respect to e-ph interaction. With optical phonons of energy ω0, only the elastic process takes place when eV < ω0, in which electrons emit and absorb phonons virtually. The process suppresses the resonant amplitude. When eV > ω0, the inelastic process is possible which is accompaniedby real emission of phonons. It results in the dephasing and broadens the resonant width. 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.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages839-840
Number of pages2
Volume893
DOIs
Publication statusPublished - 2007
Event28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
Duration: 2006 Jul 242006 Jul 28

Other

Other28th International Conference on the Physics of Semiconductors, ICPS 2006
CountryAustria
CityVienna
Period06/7/2406/7/28

Fingerprint

electron phonon interactions
phonons
interferometers
electric potential
Green's functions
quantum dots
perturbation
acoustics
energy

Keywords

  • Aharonov-Bohm interferometer
  • Decoherence
  • Electron-phonon interaction
  • Fano resonance
  • Keldysh Green function
  • Quantum dot

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Influence of electron-phonon interaction on Fano resonance in Aharonov-Bohm interferometer. / Ueda, Akiko; Eto, Mikio.

AIP Conference Proceedings. Vol. 893 2007. p. 839-840.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ueda, A & Eto, M 2007, Influence of electron-phonon interaction on Fano resonance in Aharonov-Bohm interferometer. in AIP Conference Proceedings. vol. 893, pp. 839-840, 28th International Conference on the Physics of Semiconductors, ICPS 2006, Vienna, Austria, 06/7/24. https://doi.org/10.1063/1.2730152
Ueda, Akiko ; Eto, Mikio. / Influence of electron-phonon interaction on Fano resonance in Aharonov-Bohm interferometer. AIP Conference Proceedings. Vol. 893 2007. pp. 839-840
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