Abstract

We studied the surface structure of SrF2(111) using low-energy atom scattering spectroscopy. For the spectroscopy, we used pulsed 3 keV 4He° and 3 keV 20Ne0 beams as incident particles and detected 180° backscattered particles using a microchannel plate. We compared the experimental results with simulations employing three types of surface atomic structural models: F–Sr–F, Sr–F–F, and F–F–Sr Our results demonstrate that the topmost layer of SrF2(111) has approximately 60% and 40% of F–Sr–F and Sr–F–F, respectively.

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