Abstract
The structural analysis of the physisorption system Xe/Pt(111) by means of high-resolution helium diffraction shows that the Xe monolayer exhibits a variety of structural phases: commensurate, incommensurate and “incommensurate” rotated. The observed buckling of the rotated phase demonstrates that a fraction of the Xe atoms is locked in high symmetry sites in agreement with the theoretical “coincident site lattice” concept of Fuselier et al., i.e. the rotated phase is a higher-order commensurate phase.
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