TITLE

Energy levels and electron wave functions in semiconductor quantum wells having superlattice alloylike material (0.9 nm GaAs/0.9 nm AlGaAs) as barrier layers

AUTHOR(S)
Sakaki, H.; Tsuchiya, M.; Yoshino, J.
PUB. DATE
August 1985
SOURCE
Applied Physics Letters;8/1/1985, Vol. 47 Issue 3, p295
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Energy levels and wave functions of carriers are studied both experimentally and theoretically in 4 nm GaAs quantum wells (QW's), for the case when barriers are formed with alternating layers of 0.9 nm GaAs/0.9 nm Al[sub x] Ga[sub 1-x]As (x = 0.39). The photoluminescence spectra of the QW's are studied at 77 K and are found nearly equivalent to that of conventional QW's having alloy barriers with Al content of 0.26, which is much higher than the averaged alloy composition (∼0.2). The modified Kronig-Penney analysis is found effective in predicting the observed energy and has clarified a feature of enhanced penetration of wave function into the novel barrier layer.
ACCESSION #
9817906

 

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