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 language | English |
|---|---|
| Article number | 035201 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 84 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 11 Jul 2011 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Ab initio calculation of electron-phonon scattering time in germanium
AU - Tyuterev, V. G.
AU - Obukhov, S. V.
AU - Vast, N.
AU - Sjakste, J.
PY - 2011/7/11
Y1 - 2011/7/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79961228959&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79961228959&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.84.035201
DO - 10.1103/PhysRevB.84.035201
M3 - Article
AN - SCOPUS:79961228959
VL - 84
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 3
M1 - 035201
ER -