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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 |
Appears in Collections: | Staff Publications |
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