Intervalley-scattering-induced electron-phonon energy relaxation in many-valley semiconductors at low temperatures.
We report on the effect of elastic intervalley scattering on the energy transport between electrons and phonons in many-valley semiconductors. We derive a general expression for the electron-phonon energy flow rate at the limit where elastic intervalley scattering dominates over diffusion. Electron heating experiments on doped n-type Si samples with electron concentrations (3.5-16.0) x 10(25) m(-3) are performed at sub-Kelvin temperatures. We find a good agreement between the theory and the experiment.
Prunnila
M
M
VTT Information Technology, P.O. Box 1208, FIN-02044 VTT, Espoo, Finland. mika.prunnila@vtt.fi
Kivinen
P
P
Savin
A
A
Törmä
P
P
Ahopelto
J
J