Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevB.70.081313
Title: STM observation of Ga-dimers on a GaAs(001)-c(8 × 2)-Ga surface
Authors: Xu, H. 
Sun, Y.Y. 
Li, Y.G.
Feng, Y.P. 
Wee, A.T.S. 
Huan, A.C.H. 
Issue Date: Aug-2004
Citation: Xu, H., Sun, Y.Y., Li, Y.G., Feng, Y.P., Wee, A.T.S., Huan, A.C.H. (2004-08). STM observation of Ga-dimers on a GaAs(001)-c(8 × 2)-Ga surface. Physical Review B - Condensed Matter and Materials Physics 70 (8) : 081313-1. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.70.081313
Abstract: Using in situ scanning tunneling microscopy (STM) we have obtained high-resolution empty-state images exhibiting triple-protrusion rows on GaAs(001)-c(8 × 2)-Ga surface. We assign the middle protrusion rows to the surface Ga dimers in the ξ model proposed by Lee et al. [Phys. Rev. Lett. 85, 3890 (2000)]. The surface Ga dimers, which are responsible for the c(8 × 2) periodicity, are the key feature of the ξ structure and have never been imaged in previous STM studies. The current study provides direct evidence for the ξ model, while all other existing models can be readily excluded from our STM images.
Source Title: Physical Review B - Condensed Matter and Materials Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/98025
ISSN: 01631829
DOI: 10.1103/PhysRevB.70.081313
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