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Geometric approach to determine the binding energy of quasi-two-dimensional biexcitons

Oh, IK and Singh, J (1999). Geometric approach to determine the binding energy of quasi-two-dimensional biexcitons. Physical Review B (Condensed Matter and Materials Physics),60(4):2528-2535.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 13 times in Scopus Article | Citations

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Title Geometric approach to determine the binding energy of quasi-two-dimensional biexcitons
Author Oh, IK
Singh, J
Journal Name Physical Review B (Condensed Matter and Materials Physics)
Publication Date 1999
Volume Number 60
Issue Number 4
ISSN 0163-1829   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-4243260101
Start Page 2528
End Page 2535
Total Pages 8
Place of Publication USA
Publisher The American Physical Society
HERDC Category C1 - Journal Article (DEST)
Abstract We improve upon the simple method of Singh et al. [Phys. Rev. B 53, 15 909 (1996)] to calculate the biexciton binding energy in quasi-two-dimensional (2D) quantum wells. Optimizing the geometric configuration, a simple and analytical expression for the ratio of the binding energy of a 2D biexciton to that of an exciton, Ebxx/Ebx, is derived. It is found that the geometric configuration of a positronium-molecule-like biexciton is a square and that of a hydrogen-molecule-like biexciton is a tetragon. The average interparticle distances as functions of σ are also determined. The theory is applied to GaAs, ZnSe, and CdxZn1-xSe quantum wells and the result of Ebxx/Ebx thus obtained agrees with the experimental results.
DOI http://dx.doi.org/10.1103/PhysRevB.60.2528   (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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