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- Title
Relaxation of mechanical stresses in an array of Ge quantum dots obtained in Si.
- Authors
Talochkin, A. B.; Markov, V. A.; Mashanov, V. I.
- Abstract
Raman scattering on optical phonons in Si/Ge/Si structures with Ge quantum dots grown by molecular beam epitaxy at low temperatures 200–300°C has been investigated. A pseudomorphic state of an array of Ge quantum dots to a Si matrix with an ideally sharp interface has been obtained. Features associated with the inelastic relaxation of mechanical stresses have been revealed in the Raman spectrum. Two mechanisms of stress relaxation are separated. It has been shown that the spectrum of the electronic states of the array differs significantly from the set of the discrete levels of a single quantum dot, because the relaxation is inhomogeneous.
- Subjects
RAMAN effect; PHONONS; QUANTUM dots; MOLECULAR beams; LOW temperatures
- Publication
JETP Letters, 2007, Vol 86, Issue 5, p344
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364007170146