Asymmetric structure of the Si(111)-E3×E3-Ag surface
نویسندگان
چکیده
The atomic and electronic structures of the Si(111)-E3×E3-Ag surface are studied by first-principles calculations based on the density functional theory. It is found that a structural model consisting of two inequivalent Ag triangles is energetically more favorable than the well-established honeycomb-chained-triangle (HCT) model. The new structure should yield an empty-state STM image with a hexagonal-lattice pattern, rather than a honeycomb pattern, which is confirmed by low-temperature STM observations. © 1999 Elsevier Science B.V. All rights reserved.
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