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Growth-Driven Polymorphism Engineering and Direct Phase Modulation of α- and β′-In2Se3
August 2025 • Tianru Wu, Lei Xu, Dongyan Liu, Zhenhua Wu, Han Chen, Yutao Han, Mingzheng Wang, Haoyue Guo, Tian Tan, Yakui Mu, Yang Wang, Zhongchen Song, Qunli Rao…
<title>Abstract</title> Two-dimensional (2D) In<sub>2</sub>Se<sub>3</sub> represents a uniquely versatile platform for novel electronics, hosting the rare coexistence of paraelectric (β), antiferroelectric (β'), and ferroelectric (α) phases. However, synthesizing phase-pure In<sub>2</sub>Se<sub>3</sub> films, particularly the critical ferroelectric semiconducting α-phase, is fundamentally hindered by the subtle structural distinctions and minimal energetic differences among its polymorphs. Here, we directly reveal…