Quantum size stabilization of Ge3Pt nanofilms on Ge(001)

Bene Poelsema*, Ali Safaei, Raoul van Gastel, Harold J.W. Zandvliet, Arie van Houselt

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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The electronic and structural properties of a Ge-Pt alloy film on Ge(001) were studied with low-energy electron microscopy. Well above 1000 K, a bulklike eutectic film forms, followed by the emergence of an ordered Ge3Pt alloy upon solidification, which sets in at 1004 K. This eight-layers-thick Ge3Pt phase is remarkably robust as it is stabilized by quantum size effects. Further cooling results in the evolution of ultrathin Pt-induced nanowires around 650 K. The process is reversible upon temperature variation around the eutectic point. The results are considered representative of an important class of surface alloys.

Original languageEnglish
Article number065005
JournalPhysical Review Materials
Issue number6
Publication statusPublished - 24 Jun 2019


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