Document Type
Article
Publication Date
3-15-2008
Publication Title
Physical Review B
Abstract
Scanning tunneling microscopy of Sb-capped GaAs shows the coexistence of different surface reconstructions. The majority of the surface consists of an α2(2×4) reconstruction typically observed for GaAs(001) surfaces. At step edges, an α(4×3) reconstruction, common for GaSb(001), is observed. We argue that strain couples the surface reconstruction to the film morphology. Density functional theory calculations show that the (2×4) reconstruction is stabilized in GaSb films when the lattice parameter is constrained to that of GaAs, as happens in the middle of a terrace, while the (4×3) reconstruction is stabilized when the lattice parameter is allowed to relax toward that of GaSb at step edges. This result confirms the importance of elastic relaxation in the coexistence of surface reconstructions.
Repository Citation
Bickel, Jessica E.; Modine, Normand A.; Pearson, Chris; and Millunchick, Joanna Mirecki, "Elastically Induced Coexistence of Surface Reconstructions" (2008). Physics Faculty Publications. 194.
https://engagedscholarship.csuohio.edu/sciphysics_facpub/194
DOI
10.1103/PhysRevB.77.125308
Version
Publisher's PDF
Volume
77
Issue
12
