Strong graded interface related piezoele
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E.W.S Caetano; V.N Freire; G.A Farias; E.F da Silva Jr.
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Article
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2002
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Elsevier Science
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English
⚖ 168 KB
We consider how the weakening of piezoelectric polarization e ects due to the existence of graded interfaces modiÿes the conÿned exciton properties in In0:2Ga0:8N=GaN single quantum wells. The balance between the red shift of the exciton energy related to the enormous polarization electric ÿeld insi