Journalartikel

Jahr der Veröffentlichung: 1997

Seiten: 4717-4722

Zeitschrift: Physical Review B

Bandnummer: 55

Heftnummer: 7

DOI Link: https://doi.org/10.1103/PhysRevB.55.4717

Verlag: American Physical Society

Abstract: 

The temperature-dependent behavior of the Rh(111)-(2×2)-1O phase was investigated by He-atom scattering (HAS) and low-energy electron diffraction. The adsorption system undergoes an order-disorder phase transition at Tc=280±5 K, with critical exponents found to be consistent with the four-state Potts model. Beyond the phase transition the HAS specular peak intensity exhibits a strong and reversible increase. This finding points toward a reduction of the surface charge-density corrugation induced by the phase transition itself. Around 160 K, hydrogen adsorbed on the Rh(111)-(2x2)-1O surface reacts with oxygen to form water, and drives the overlayer in an out-of-equilibrium condition which is characterized by a dramatic domain-wall proliferation.

Harvard-Zitierstil: Over, H., Schwegmann, S., Cvetko, D., De Renzi, V., Floreano, L., Gotter, R., et al. (1997) Unusual disordering processes of oxygen overlayers on Rh(111): A combined diffraction study using thermal He atoms and low-energy electrons, Physical Review B, 55(7), pp. 4717-4722. https://doi.org/10.1103/PhysRevB.55.4717

APA-Zitierstil: Over, H., Schwegmann, S., Cvetko, D., De Renzi, V., Floreano, L., Gotter, R., Morgante, A., Peloi, M., Tommasini, F., & Zennaro, S. (1997). Unusual disordering processes of oxygen overlayers on Rh(111): A combined diffraction study using thermal He atoms and low-energy electrons. Physical Review B. 55(7), 4717-4722. https://doi.org/10.1103/PhysRevB.55.4717