Hexagonal Ge1-xSnx alloys maintain a direct bandgap at Gamma with strong bowing and robust polarization anisotropy in the dilute Sn regime.
Vegard, Die Konstitution der Mischkristalle und die Raumf¨ ullung der Atome, Zeitschrift f¨ ur Physik5, 17 (1921)
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Structural, electronic, and optical properties of hexagonal GeSn from density functional theory
Hexagonal Ge1-xSnx alloys maintain a direct bandgap at Gamma with strong bowing and robust polarization anisotropy in the dilute Sn regime.