TITLE

Energy band discontinuities in heterojunctions measured by internal photoemission

AUTHOR(S)
Heiblum, M.; Nathan, M. I.; Eizenberg, M.
PUB. DATE
September 1985
SOURCE
Applied Physics Letters;9/1/1985, Vol. 47 Issue 5, p503
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A novel method involving internal photoemission has been developed to determine the conduction band discontinuity Δ Ec of heterojunctions. The method is straightforward, accurate, and assumes minimum unknowns; and has been applied to GaAs/AlxGa1-xAs heterojunctions. We have found for x<0.4 that Δ Ec[bar_over_tilde:_approx._equal_to]0.62 Δ Eg, where Δ Eg is the band-gap difference. For x>0.4, the apparent Δ Ec is considerably smaller.
ACCESSION #
9818089

 

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