Stacking selected polarization switching and phase transition in vdW ferroelectric α-In2Se3 junction devices

IF 14.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Yuyang Wu, Tianjiao Zhang, Deping Guo, Bicheng Li, Ke Pei, Wenbin You, Yiqian Du, Wanchen Xing, Yuxiang Lai, Wei Ji, Yuda Zhao, Renchao Che
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Abstract

The structure and dynamics of ferroelectric domain walls are essential for polarization switching in ferroelectrics, which remains relatively unexplored in two-dimensional ferroelectric α-In2Se3. Interlayer interactions engineering via selecting the stacking order in two-dimensional materials allows modulation of ferroelectric properties. Here, we report stacking-dependent ferroelectric domain walls in 2H and 3R stacked α-In2Se3, elucidating the resistance switching mechanism in ferroelectric semiconductor-metal junction devices. In 3R α-In2Se3, the in-plane movement of out-of-plane ferroelectric domain walls yield a large hysteresis window. Conversely, 2H α-In2Se3 devices favor in-plane domain walls and out-of-plane domain wall motion, producing a small hysteresis window. High electric fields induce a ferro-paraelectric phase transition of In2Se3, where 3R In2Se3 reaches the transition through intralayer atomic gliding, while 2H In2Se3 undergoes a complex process comprising intralayer bond dissociation and interlayer bond reconstruction. Our findings demonstrate tunable ferroelectric properties via stacking configurations, offering an expanded dimension for material engineering in ferroelectric devices.

Abstract Image

vdW铁电α-In2Se3结器件的叠加选择极化开关和相变
铁电畴壁的结构和动力学对铁电体的极化开关至关重要,但在二维铁电α-In2Se3中尚未得到充分的研究。通过选择二维材料的堆叠顺序进行层间相互作用工程,可以调制铁电性质。在这里,我们报道了在2H和3R堆叠α-In2Se3中的堆叠依赖的铁电畴壁,阐明了铁电半导体-金属结器件中的电阻开关机制。在3R α-In2Se3中,面外铁电畴壁的面内运动产生了较大的滞后窗口。相反,2H α-In2Se3器件有利于面内畴壁和面外畴壁运动,产生较小的滞后窗口。高电场诱导In2Se3发生铁-类电相变,其中3R In2Se3通过层内原子滑动实现相变,而2H In2Se3则经历了层内键解离和层间键重建的复杂过程。我们的研究结果通过堆叠结构证明了可调的铁电特性,为铁电器件的材料工程提供了一个扩展的维度。
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来源期刊
Nature Communications
Nature Communications Biological Science Disciplines-
CiteScore
24.90
自引率
2.40%
发文量
6928
审稿时长
3.7 months
期刊介绍: Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.
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