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2DM研究文章|Ferroelectric α-In2Se3 under pressure: reversible and irreversible phase transitions

07 Jul 2026 gabriels

Ferroelectrics are important in many technological applications, from sensors and actuators to memory and fast-switching devices. The key to their versatility lies in the coupling between their electrical and mechanical properties, which can be controlled reversibly under different external conditions. Here, we report the effects of hydrostatic pressure on structural and ferroelectric phase transitions in the van der Waals material indium selenide α-In₂Se₃, as probed by Raman spectroscopy and imaging in a high-pressure diamond anvil cell. We demonstrate that 2H-α-In₂Se₃ has a stronger ferroelectric phase stability than that reported in other polytype phases of polycrystalline In₂Se₃. Furthermore, we show that disorder is a key factor in the reversibility of the phase transition from ferroelectric 2H-α-In₂Se₃ to paraelectric β-In₂Se₃.

文章介绍

Ferroelectric α-In₂Se₃ under pressure: reversible and irreversible phase transitions

Nada Alghofaili, Anna Kusmartseva, Mark T Greenaway and Amalia Patané

通讯作者：

Anna Kusmartseva，英国拉夫堡大学
Mark T Greenaway，英国拉夫堡大学
Amalia Patané，英国诺丁汉大学

期刊介绍

2D Materials

2025年影响因子: 4.3 Citescore: 8.0
2D Materials（2DM）创刊于2014年，是国际上二维材料领域的第一个学术期刊，是中国科协高质量科技期刊一区期刊，旨在报道二维材料研究及应用领域最具创新性和影响力的前沿科研成果，促进二维材料领域的学术成果交流。期刊立足于多学科视角，致力于涵盖石墨烯及其他二维材料相关研究的各个方面，包括二维材料的制备、表征、物理、性质研究及器件、能源、催化、复合材料等应用。