Tight-binding representation of the optical matrix elements: Theory and applications
- 15 June 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 47 (23) , 15500-15508
- https://doi.org/10.1103/physrevb.47.15500
Abstract
We have derived new expressions for the interband optical matrix elements of crystalline solids, applicable when the k-space Hamiltonian is known. The formalism does not require a complete knowledge of the electronic states and is hence useful for empirical band-structure calculations. We find that no additional parameters, other than those present in the Hamiltonian, are required. The accuracy of the results obtained from different tight-binding parameter sets for the GaAs/AlAs system for bulk semiconductors and heterostructures is compared.Keywords
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