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Updated: Jun 6, 2025

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在滑动铁电器中对铁电进行大光诱导调节

Lingyuan Gao¹, Laurent Bellaiche^1,2

¹Smart Ferroic Materials Center, Physics Department and Institute for Nanoscience and Engineering, <a href="https://ror.org/05jbt9m15">University of Arkansas</a>, Fayetteville, Arkansas 72701, USA.

Physical review letters

|November 22, 2024

概括

研究人员可以通过使用光来调整二维材料中的铁电. 光刺激通过结构和电荷效应改变堆叠过渡金属二二二烯酸中的电极化.

科学领域:

材料科学材料科学材料科学
凝聚物质物理学凝聚物质物理学
纳米技术纳米技术

背景情况:

在二维材料中采集铁电是通过堆叠非极性单层来实现的.
在特定的堆叠序列中,层间的电荷转移会产生外平面二极体,可以通过层间滑动调节.

研究的目的:

通过光激发,证明在面叠加的双层MoS2中对电极化的强有力的调整.
阐明光刺激在调节滑动铁电中的机制和作用.

主要方法:

使用ab initio计算来研究圆柱状堆叠的双层MoS2.
研究了光刺激对不同光强度下的偏振的影响.

主要成果:

光刺激可对给定的滑动在很大范围内稳定调整平面外的电极化.
调源于光诱导的结构扭曲和光激发的载体分布.
不同的光强度在调节滑动铁电中起着不同的作用.

结论:

光刺激提供了一种强大的方法来操纵二维范德瓦尔斯材料中的极化.
了解光物质相互作用是控制先进材料铁电性能的关键.

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