Order-disorder transition of the (3X3) Sn/Ge(111) phase - art. no. 075405

Authors
Floreano, L Cvetko, D Bavdek, G Benes, M Morgante, A
Citation
L. Floreano et al., Order-disorder transition of the (3X3) Sn/Ge(111) phase - art. no. 075405, PHYS REV B, 6407(7), 2001, pp. 5405
Citations number
41
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6407
Issue
7
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010815)6407:7<5405:OTOT(S>2.0.ZU;2-J
Abstract
We have measured the long-range order of the alpha phase of Sn on the Ge(11 1) surface throughout the (3 x 3) --> (root3 x root3)R30 degrees phase tran sition. The transition has been found of the order-disorder type with a cri tical temperature T-c similar to 220 K. The expected three-state Potts crit ical exponents are shown to be consistent with the observed power-law depen dence of the (3 x 3) order parameter and its correlation length close to T- c, thus excluding a charge-density wave driven phase transition.