Atomic distributions observed in group IV-IV binary tetrahedron alloys: A revised analysis of SiGe and GeSn compounds

This manuscript is an attempt to extend the Strained Tetrahedron Model to the interpretation of the EXAFS spectra of Group-IV-IV binary tetrahedron ordered B3 zinc blende alloys. The analysis clearly points out the difference of these systems respect to other binary alloys. To illustrate and describ...

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Bibliographic Details
Published in:Journal of alloys and compounds 2020-08, Vol.831, p.154743, Article 154743
Main Authors: Robouch, B.V., Valeev, R.G., Kisiel, A., Marcelli, A.
Format: Article
Language:English
Subjects:
Alloy systems
Binary alloys
Binary systems
GeSi
GeSn
Group IV-IV binary tetrahedron ordered alloys
Intermetallic compounds
Site occupation preference
Tetrahedra
Zincblende
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Summary:This manuscript is an attempt to extend the Strained Tetrahedron Model to the interpretation of the EXAFS spectra of Group-IV-IV binary tetrahedron ordered B3 zinc blende alloys. The analysis clearly points out the difference of these systems respect to other binary alloys. To illustrate and describe the application of the Strained Tetrahedron Model a revised characterization of Ge1-xSix and Ge1-xSnx alloys is presented and discussed. [Display omitted] •This model treats Group IV-IV binary B3 alloys and interprets SiGe and GeSn alloys.•In GeSi 3 Si-based configurations occur while in Ge one configuration is lacking.•In GeSn only one of 3 possible configurations is observed.•The model successfully explains Group IV-IV binary tetrahedron ordered B3 alloys.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.154743