Wannier quantization of a superlattice subband under an electric field
Jian-Bai Xia; Kun Huang; Jian-Bai Xia; CCAST World Lab., Beijing, China; Kun Huang; CCAST World Lab., Beijing, China
Журнал:
Journal of Physics: Condensed Matter
Дата:
1991-06-24
Аннотация:
Wavefunctions of electronic Wannier-Stark states in a superlattice are calculated with a finite Kronig-Penney model. Overlap integrals between electron and heavy-hole wavefunctions centred in the same well layer, and in first- and second-neighbour wells are calculated as functions of the applied field. The results show good agreement with experimental results on photoluminescence. The problem is also treated by a one-band approximation method, which gives a closed expression for the wavefunction of the Wannier-Stark states; this is compared with the results of accurate calculations with the Kronig-Penney model.
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