Quantum size stabilization of Ge3Pt nanofilms on Ge(001)

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

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Abstract

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
Volume3
Issue number6
DOIs
Publication statusPublished - 24 Jun 2019

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Stabilization
stabilization
eutectics
Eutectics
Electronic properties
Electron microscopy
solidification
Nanowires
Solidification
Structural properties
electron microscopy
nanowires
Cooling
cooling
electronics
Temperature
temperature
energy

Cite this

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title = "Quantum size stabilization of Ge3Pt nanofilms on Ge(001)",
abstract = "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.",
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Quantum size stabilization of Ge3Pt nanofilms on Ge(001). / Poelsema, Bene; Safaei, Ali; Van Gastel, Raoul; Zandvliet, Harold J.W.; Van Houselt, Arie.

In: Physical Review Materials , Vol. 3, No. 6, 065005, 24.06.2019.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Quantum size stabilization of Ge3Pt nanofilms on Ge(001)

AU - Poelsema, Bene

AU - Safaei, Ali

AU - Van Gastel, Raoul

AU - Zandvliet, Harold J.W.

AU - Van Houselt, Arie

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AB - 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.

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