Phase stability and transition behaviors of (BixIn1−x)2Se3 alloy
Date
2025-01-03
Journal Title
Journal ISSN
Volume Title
Publisher
Applied Physics Letters
Abstract
The Bi2Se3–In2Se3 layered system has garnered significant attention and extensive research due to its versatile properties, yet its structural properties and phase stability remain elusive. Here, using first-principles calculations with van der Waals interactions, we systematically study the phase stability and transition behavior of (BixIn1−x)2Se3 alloys. Our results reveal a contrasting stability profile between Bi2Se3 and In2Se3, with the former exhibiting a distinct preference for the β phase over the α phase, while the latter shows similar stabilities in both phases, thus partially addressing previously reported ground-state inconsistencies. Exploring composition–structure relationships, we demonstrate that Bi incorporation in low concentrations stabilizes the β phase, consistent with early experimental observations. Further analysis based on the cation orbital properties indicates that the preference of Bi for octahedral sites over tetrahedral ones drives the small critical composition for the α→β phase transition. This work enhances our understanding of phase stability in (BixIn1−x)2Se3 alloys, providing insights for future design of monophasic materials and advanced applications.
Description
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Huachun Wang, Xuefen Cai, Wei Li, Bin Wang, Igor Evangelista, Anderson Janotti; Phase stability and transition behaviors of (BixIn1−x)2Se3 alloy. Appl. Phys. Lett. 6 January 2025; 126 (1): 012106. https://doi.org/10.1063/5.0243242 and may be found at https://doi.org/10.1063/5.0243242.
© 2025 Author(s). Published under an exclusive license by AIP Publishing.
This article will be embargoed until 01/03/2026.
Keywords
Citation
Huachun Wang, Xuefen Cai, Wei Li, Bin Wang, Igor Evangelista, Anderson Janotti; Phase stability and transition behaviors of (BixIn1−x)2Se3 alloy. Appl. Phys. Lett. 6 January 2025; 126 (1): 012106. https://doi.org/10.1063/5.0243242