BROMIDE ADSORPTION ON AG(001) - A POTENTIAL INDUCED 2-DIMENSIONAL ISING ORDER-DISORDER TRANSITION

Authors
OCKO BM WANG JX WANDLOWSKI T
Citation
Bm. Ocko et al., BROMIDE ADSORPTION ON AG(001) - A POTENTIAL INDUCED 2-DIMENSIONAL ISING ORDER-DISORDER TRANSITION, Physical review letters, 79(8), 1997, pp. 1511-1514
Citations number
24
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
79
Issue
8
Year of publication
1997
Pages
1511 - 1514
Database
ISI
SICI code
0031-9007(1997)79:8<1511:BAOA-A>2.0.ZU;2-5
Abstract
The adsorption of bromide on an Ag(001) electrode has been investigate d using in situ x-ray scattering methods. With increasing potential, t he bromide undergoes a second order phase transition from a lattice ga s to an ordered c(2 x 2) structure. The order parameter is consistent with the 2D Ising model prediction beta = 1/8. A comparison of x-ray a nd electrochemical measurements indicates significant lateral disorder at low coverages which decreases with increasing coverage.