The initial growth of silver on Pt(111) revisited

Esther van Vroonhoven (Speaker), Poelsema, B. (Contributor)

Activity: Talk or presentationOral presentation

Description

Ultrathin films of silver on Pt(111) are quite commonly considered as a model system for surface confined alloying: If deposited (or heated) at, or above, 550 K the first monolayer has been reported to initially form an alloy, followed by de-alloying towards monolayer completion [1].

New mesoscopic measurements, performed with LEEM, reveal evidence for yet unanticipated and highly complex behaviour. Various unanticipated and complex process, governed by different aspects of stress and strain, determine the evolution of the growing film. They include alloying, de-alloying, segregation, re-entrant partial alloying and gradual de-alloying.

As will be shown and discussed, the concept of a neatly behaving, simple model system for surface confined alloying need substantial revison.

[1] H. Roeder, R. Schuster, H. Brune and K. Kern, Phys. Rev. Lett. 71, 2086 (1994)
Period26 Mar 2007
Event titleDPG Frühjahrstagung 2007 Regensburg: (DPG Spring Meeting)
Event typeConference
LocationRegensburg, Germany
Degree of RecognitionInternational

Keywords

  • METIS-245091