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Study of the localization lengths in non‐periodic GaAs/Al 0.3 Ga 0.7 As superlattices
Author(s) -
Usher Marilyn,
Ranganathan Radha
Publication year - 1996
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221970114
Subject(s) - superlattice , wave function , photoluminescence , condensed matter physics , bound state , energy (signal processing) , physics , materials science , chemistry , atomic physics , quantum mechanics , optics
Electronic states and the wavefunction localization lengths for non‐periodic GaAs/Al 0.3 Ga 0.7 As superlattices are calculated and also studied experimentally using photoluminescence. Non‐periodicity causes the first bound state to shift down in energy. A relation between the shift in energy from the periodic case and the wavefunction localization length is derived and used to obtain the localization length experimentally from photoluminescence measurements. The localization length thus obtained is compared with the results from a direct calculation of the wavefunction.