Surface x-ray diffraction study of the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="normal">Rh</mi><mn></mn><mo>(</mo><mn>100</mn><mo>)</mo><mo>(</mo><mn>2</mn><mn></mn><mo>×</mo><mn>2</mn><mo>)</mo><mo>−</mo><mi mathvariant="normal">O</mi></math></span> reconstruction

A. G. Norris; F. Schedin; G. Thornton; V. R. Dhanak; T. S. Turner; R. McGrath

doi:10.1103/PhysRevB.62.2113

Surface x-ray diffraction study of the $Rh (100) (2 \times 2) - O$ reconstruction

A. G. Norris, F. Schedin, G. Thornton, V. R. Dhanak, T. S. Turner, and R. McGrath

Phys. Rev. B 62, 2113 – Published 15 July 2000

Abstract

The 0.5 ML oxygen-induced reconstruction of the Rh(100) surface has been investigated using surface x-ray diffraction. The rhodium atoms in the surface layer adopt a “clock” reconstruction with an in-plane displacement of the surface-layer Rh atoms of $d_{Rh xy} = 0.19 \pm 0.02 Å .$ The oxygen atoms were found to be situated in the “diamond” site rather than the rotated fourfold hollow site, with an in-plane displacement of $0.20 \pm 0.05 Å$ on either side of the center. This work supports the conclusions of recent density-functional theory and low-energy-electron-diffraction work.