Contreras, G. ; Sood, A. K. ; Cardona, M. (1985) Raman scattering by intervalley carrier-density fluctuations in n-type Ge: uniaxial stress and resonance effects Physical Review B: Condensed Matter and Materials Physics, 32 (2). pp. 930-933. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v32/i2/p930_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.32.930
Abstract
We report the observation of light scattering by intervalley density fluctuations in n-type germanium. This scattering appears as a Lorentzian tail near the exciting laser frequency extending up to ~500 cm−1. Application of a uniaxial stress of 15 kbar along [111] results in the disappearance of this scattering, thus confirming the assignment to intervalley fluctuations. The effect has been shown to resonate near the E1 interband gap of Ge (~2.1 eV). An analysis of the dependence of the scattering on photon wavelength suggests that the effect is due mainly to intravalley diffusion and not to intervalley scattering.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 50262 |
| Deposited On: | 22 Jul 2011 13:37 |
| Last Modified: | 22 Jul 2011 13:37 |
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