Structural transitions at high pressure and metastable phase in Si0.8Ge0.2

Structural transitions at high pressure and metastable phase in Si0.8Ge0.2

The high-pressure behaviour of Si0.8Ge0.2 alloy is explored using in situ Raman spectroscopy, X-ray diffraction techniques and density functional theory (DFT) simulations. High pressure experiments revealed a pressure-induced transition from the stable cubic semiconducting phase (dc- Si0.8Ge0.2) to...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of alloys and compounds 2023-09, Vol.954, p.170180, Article 170180
Hauptverfasser: Gerin, M., Machon, D., Radescu, S., Le Floch, S., Le Godec, Y., Gaudisson, T., Alabarse, F., Veber, P., Debord, R., Amans, D., Pischedda, V.
Format: Artikel
Sprache:eng
Schlagworte:
Condensed Matter
Density functional theory
High-pressure
Metastable phases
Physics
Raman spectroscopy
Si-Ge alloys
X-ray diffraction
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The high-pressure behaviour of Si0.8Ge0.2 alloy is explored using in situ Raman spectroscopy, X-ray diffraction techniques and density functional theory (DFT) simulations. High pressure experiments revealed a pressure-induced transition from the stable cubic semiconducting phase (dc- Si0.8Ge0.2) to the tetragonal β-tin metallic phase (β-Si0.8Ge0.2) during compression. This sluggish transition is significantly accelerated at moderate temperature (
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2023.170180