An investigation was made of the surface properties of InAs(111)A by using low-temperature scanning tunnelling microscopy at atomic resolution, and first-principles calculations. Very clear atomic images were observed, showing that the surface reconstruction was an In-vacancy structure. Two types of adsorbate were observed at the surface. The first-principles calculations indicated that the In-vacancy structure was the most stable surface reconstruction under any experimental conditions. This was consistent with low-temperature scanning tunnelling microscopic observation. Investigations of adsorption properties of an In atom, an As atom, and an As2 molecule - using first-principles calculations - implied that the observed adsorbates were an In atom and an As2 molecule.

Stable Reconstruction and Adsorbates of InAs(111)A Surface. A.Taguchi, K.Kanisawa: Applied Surface Science, 2006, 252[15], 5263-6