Adsorption-site mixing at a continuous order-disorder phase transition
- 15 July 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 52 (3), 2138-2143
- https://doi.org/10.1103/physrevb.52.2138
Abstract
The temperature-dependent probability of occupation of the two threefold-coordinated adsorption sites was determined for the system S/Ru(0001) at a coverage of 0.33, analyzing energy-dependent intensity curves [I(E) curves] in low-energy electron diffraction of the ordered √3 × √3 R30° phase and of the disordered system. We show that this probability agrees fully with a lattice gas model containing a finite difference in adsorption energy between these sites.Keywords
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