Ab initio calculation of electron-phonon scattering time in germanium

V. G. Tyuterev, S. V. Obukhov, N. Vast, J. Sjakste

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The intervalley scattering time in n-type germanium from the Γ valley to the L, Δ, and X valleys, has been computed ab initio with a method based on the density functional perturbation theory. We demonstrate that the pressure dependence of the lifetime of the exciton limited by the electron-phonon interaction is well described. Moreover, we discuss relaxation times measured by various pump-probe experiments at low and ambient temperatures. The contributions of the various phonons to the scattering are computed. Relaxation times due to the electron-phonon coupling are provided for each intervalley transition, as well as their behavior under pressure.

Original languageEnglish
Article number035201
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number3
DOIs
Publication statusPublished - 11 Jul 2011
Externally publishedYes

Fingerprint

Germanium
Phonon scattering
Electron scattering
Relaxation time
valleys
germanium
relaxation time
Scattering
Electron-phonon interactions
Phonons
Electron transitions
electron phonon interactions
scattering
Excitons
pressure dependence
ambient temperature
phonons
electrons
perturbation theory
excitons

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Ab initio calculation of electron-phonon scattering time in germanium. / Tyuterev, V. G.; Obukhov, S. V.; Vast, N.; Sjakste, J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 3, 035201, 11.07.2011.

Research output: Contribution to journalArticle

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