Local interface composition and extended defect density in ZnSe/GaAs(001) and ZnSe/In0.04Ga0.96As(001) heterojunctions
We have recently shown that in II-VI/III-V heterojunctions and related devices fabricated by molecular beam epitaxy, the II/VI flux ratio employed during the early stages of II-VI growth can be used to control the local interface composition and the band alignment. Here we demonstrate that the local interface composition in pseudomorphic, strained ZnSe/GaAs(001) heterostructures as well as lattice-matched ZnSe/In0.04Ga0.96As(001) heterostructures also have a dramatic effect on the nucleation of native stacking fault defects. Such extended defects have been associated with the early degradation of blue-green lasers. We found, in particular, that Se-rich interfaces consistently exhibited a density of Shockley stacking fault pairs below our detection limit and three to four orders of magnitude lower than those encountered at interfaces fabricated in Zn-rich conditions. (C) 1997 American Vacuum Society. [S0734-211X(97)09104-X].
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Heun, S., Paggel, J. J., Sorba, L., Rubini, S., Franciosi, A., Bonard, J. M., & Ganiere, J. D. (1997). Local interface composition and extended defect density in ZnSe/GaAs(001) and ZnSe/In0.04Ga0.96As(001) heterojunctions. Journal of Vacuum Science & Technology B (1992-2009), 15(4), 1279–1285. https://doi.org/10.1116/1.589451
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WOS:A1997XT08800087
1997
15
4
1279
1285
Univ minnesota,dept chem engn & mat sci,minneapolis,mn 55455. ecole polytech fed lausanne,inst micro & optoelect,dept phys,ch-1015 lausanne,switzerland. cnr,ist icmat,i-00016 rome,italy. univ trieste,dipartimento fis,i-34127 trieste,italy. Heun, S, LAB NAZL TASC INFM,AREA RIC,PADRICIANO 99,I-34012 TRIESTE,ITALY.
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