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Dependence of exciton formation on its center-of-mass momentum in quantum wells

Oh, IK and Singh, J (2001). Dependence of exciton formation on its center-of-mass momentum in quantum wells. International Journal of Modern Physics B,15(28-30):3660-3663.

Document type: Journal Article
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Title Dependence of exciton formation on its center-of-mass momentum in quantum wells
Author Oh, IK
Singh, J
Journal Name International Journal of Modern Physics B
Publication Date 2001
Volume Number 15
Issue Number 28-30
ISSN 0217-9792   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-0035841977
Start Page 3660
End Page 3663
Total Pages 4
HERDC Category C1 - Journal Article (DEST)
Abstract We present a comprehensive study of the process of exciton formation due to exciton-phonon interaction. Using the exciton-phonon interaction arising from deformation potential, piezoelectric, and polar couplings, we have calculated the rate of formation of an exciton as a function of carrier densities, temperatures, and center-of-mass momentum (K-parallel to) in quantum wells. Our results show that excitons are dominantly formed at nonzero K-parallel to, which agrees very well with experiments. The formation of an exciton due to emission of longitudinal optical phonon is found to be more efficient at relatively small values of K-parallel to and that due to acoustic phonon emission is more efficient at relatively large K-parallel to values or carrier temperature Te-h less than or similar to 50 K.
Keywords energy relaxation
DOI http://dx.doi.org/10.1142/S0217979201008378   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Wed, 28 Nov 2007, 14:16:08 CST