Abstract
We demonstrate experimentally the role of preexisting populations on the relaxation of nonequilibrium carriers in bulk semiconductors: A substantial acceleration is observed for cold preexcited carriers and a slowing down for hot equilibrium carriers. Experiments in doped samples show that holes are predominantly responsible for the acceleration of the thermalization. The observed acceleration (slowing down) is readily explained by favorable (unfavorable) conditions for the excitation of weakly damped nonequilibrium acoustic plasmons.
| Original language | English |
|---|---|
| Pages (from-to) | R8453-R8456 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 60 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 1 Jan 1999 |
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