Structural analysis of an InP(111)A surface using reflection high-energy electron diffraction rocking curves. (8th July 2019)

• Record Type: Journal Article
• Authors: Horio, Yoshimi; Yuhara, Junji; Takakuwa, Yuji
• Is Part Of: Japanese journal of applied physics. Volume 58:Number SI(2019)
• Publication Date: 2019-07-08
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/1347-4065/ab106e
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: The surface structure of InP(111)A has been investigated using reflection high-energy electron diffraction (RHEED) rocking curves and first-principles calculations. We used Ar ion sputtering and low-temperature annealing at about 200 °C as a cleaning method, which yields a (1 × 1) surface structure. RHEED rocking curves reveal that the interatomic distance of the top surface bilayer is compressive. First-principles calculations were performed based on a (2 × 2) unit mesh to obtain a stable structure. The calculated results suggest that a surface compressive bilayer is necessary when In atoms are removed from the surface. We conclude that the InP(111)A-(1 × 1) surface structure comprises about 20%–40% In defects, which exist randomly on the surface, and the compressed surface bilayer has an interval of 0.1 Å.