Formation and interaction of dislocation-induced and vicinal monatomic steps on a GaAs(001) surface under stress relaxation

Formation and interaction of curved vicinal and straight dislocation-induced steps of monatomic height on smooth GaAs(001) surface is studied under thermo-mechanical stress relaxation in GaAs/AlGaAs heterostructures bonded to glass. Typical dislocation phenomena, like transverse glide, are revealed...

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Bibliographic Details
Published in:Scripta materialia 2016-03, Vol.114, p.125-128
Main Authors: Akhundov, I.O., Kazantsev, D.M., Alperovich, V.L., Rudaya, N.S., Rodyakina, E.E., Latyshev, A.V.
Format: Article
Language:English
Subjects:
Annealing
Bonding
Curved
Dislocation nucleation
Dislocation-induced monatomic steps
Dislocations
Formations
Glide
Heterostructures
Slip
Small scale
Stress relaxation
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Summary:Formation and interaction of curved vicinal and straight dislocation-induced steps of monatomic height on smooth GaAs(001) surface is studied under thermo-mechanical stress relaxation in GaAs/AlGaAs heterostructures bonded to glass. Typical dislocation phenomena, like transverse glide, are revealed in the slip steps patterns. At elevated temperatures, slip steps keep their straight shape, while curved vicinal steps acquire distinct small-scale (~10nm) undulations caused, presumably, by kink bunching. Annihilation of steps with opposite signs and anticrossing of slip steps with each other and with vicinal steps are studied. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2015.12.017