论文标题
2D范德华材料中的相互相关的铁电材料
Intercorrelated ferroelectrics in 2D van der Waals materials
论文作者
论文摘要
2D相互关联的铁电源表现出耦合的平面内和平面外铁电性，是凝聚生物材料领域的一种基本现象。当前的研究基于单层双向反转不对称的范式，该层将2D互相关的铁电限制为极少数系统。本文中，我们提出了一种新的方案，用于使用范德华（VDW）相互作用来实现2D相互相关的铁电器，并将此方案应用于庞大的2D VDW材料家族。 Using first-principles, we demonstrate that 2D vdW multilayers-for example, BN, MoS2, InSe, CdS, PtSe2, TI2O, SnS2, Ti2CO2 etc.- can exhibit coupled in-plane and out-of-plane ferroelectricity, thus yielding 2D intercorrelated ferroelectricsferroelectric physics.我们进一步预测，这种相互相关的铁电体可以证明许多不同的特性，例如，三层PTSE2中自旋纹理的电气完全控制，以及对四层VS2中山谷对抗性物理的电永久控制。我们的发现为2D相互相关的铁电研究打开了一个新的方向。
2D intercorrelated ferroelectrics, exhibiting a coupled in-plane and out-of-plane ferroelectricity, is a fundamental phenomenon in the field of condensed-mater physics. The current research is based on the paradigm of bi-directional inversion asymmetry in single-layers, which restricts 2D intercorrelated ferroelectrics to extremely few systems. Herein, we propose a new scheme for achieving 2D intercorrelated ferroelectrics using van der Waals (vdW) interaction, and apply this scheme to a vast family of 2D vdW materials. Using first-principles, we demonstrate that 2D vdW multilayers-for example, BN, MoS2, InSe, CdS, PtSe2, TI2O, SnS2, Ti2CO2 etc.- can exhibit coupled in-plane and out-of-plane ferroelectricity, thus yielding 2D intercorrelated ferroelectricsferroelectric physics. We further predict that such intercorrelated ferroelectrics could demonstrate many distinct properties, for example, electrical full control of spin textures in trilayer PtSe2 and electrical permanent control of valley-contrasting physics in four-layer VS2. Our finding opens a new direction for 2D intercorrelated ferroelectric research.
