Ab initio calculation of electron-phonon scattering time in germanium

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

Результат исследований: Материалы для журналаСтатья

29 Цитирования (Scopus)

Аннотация

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.

Язык оригиналаАнглийский
Номер статьи035201
ЖурналPhysical Review B - Condensed Matter and Materials Physics
Том84
Номер выпуска3
DOI
СостояниеОпубликовано - 11 июл 2011
Опубликовано для внешнего пользованияДа

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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