Structures of the As-deficient phase on GaAs(001)-(2x4)
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- National Institute for Materials Science (NIMS), Tsukuba 305-0044 (Japan)
The atomic structures of the GaAs(001)-(2x4) surface have been studied using scanning tunneling microscopy (STM), reflectance difference spectroscopy (RDS), and reflection high-energy electron diffraction (RHEED). While STM images from the {beta} phase show well-ordered {beta}2 structures, the {alpha} phase consists of (2x4) structures with surface As dimers locally missing from the basic {beta}2(2x4) units. Our RDS and RHEED analyses, together with STM observations, clearly show that the missing-dimer defect has local atomic geometry identical to the {alpha}2(2x4) structure.
- OSTI ID:
- 20853777
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 16 Vol. 74; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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