THE Au(110)(2×1)SURFACE PHASE DIAGRAM AND(2×1)ORDERING AFTER GROWTH

L. Barbier, B. Salanon and J. Sprösser
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L. Barbier: C.E.A. DRECAM/SRSIM C.E. Saclay, 91191 Gif sur Yvette Cedex, France
B. Salanon: C.E.A. DRECAM/SRSIM C.E. Saclay, 91191 Gif sur Yvette Cedex, France
J. Sprösser: C.E.A. DRECAM/SRSIM C.E. Saclay, 91191 Gif sur Yvette Cedex, France

Surface Review and Letters (SRL), 1994, vol. 01, issue 01, 75-88

Abstract: The Au(110) surface has a(2×1)missing row reconstruction. Its temperature phase diagram is investigated by a Monte Carlo simulation. The comparison of MC calculations with equilibrium data shows that attractive interactions are very likely to be between steps of opposite sign. By depositing, at low temperature, 1/2 Au monolayer a new metastable(1×1)phase can be formed. The kinetics of the(2×1)ordering upon annealing is found to be slow and necessitates interlayer mass transport as shown by step formation. By depositing 1 Au monolayer, a mostly(2×1)disordered surface is created. Upon annealing the ordering process requires no step formation and occurs at a lower temperature.

Date: 1994
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DOI: 10.1142/S0218625X94000102

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