论文标题
电抗抗纤维电晶体中的电转换隐藏自旋极化
Electrically switchable hidden spin polarization in antiferroelectric crystals
论文作者
论文摘要
隐藏的自旋极化（HSP）出现在中心对称晶体中，因为在每个局部部门缺乏反转对称性，因此可以观察到真实空间中的可见自旋分裂。从紧密结合模型开始，我们引入了非肌抗fiferroelelectric（AFE）晶体，作为一种新的功能材料，可以表现出强烈的局部自旋极化。这样的AFE晶体基本上可以分类为平面和平面外AFE配置，并且可以通过电场可逆地切换到铁电相，以表现出全局的自旋分离，从而实现了旋转依赖性特性的非挥发性电控制。基于第一原则计算，我们预测了新下降的二维材料的AFE阶段中强HSP的实现，即Quintuple-Layer（QL）Libio $ _2 $。此外，讨论了自发的电力极化（$ \ sim $ 0.3 nc/m）和过渡屏障以及Ql-libio $ _2 $的可调旋转极化。
Hidden spin polarization (HSP) emerges in centrosymmetric crystals where visible spin splittings in the real space can be observed because of the lack of inversion symmetry in each local sector. Starting from tight-binding models, we introduce nonsymmorphic antiferroelectric (AFE) crystals as a new class of functional materials that can exhibit strong local spin polarization. Such AFE crystals can be basically classified as in-plane and out-of-plane AFE configurations, and can be reversibly switched to the ferroelectric phase by an electric field to manifest global spin splittings, enabling a nonvolatile electrical control of spin-dependent properties. Based on first-principle calculations, we predict the realization of strong HSP in the AFE phase of a newly-discovered two-dimensional materials, quintuple-layer (QL) LiBiO$_2$. Furthermore, the spontaneous electric polarization ($\sim$ 0.3 nC/m) and the transition barrier as well as the tunable spin polarization of QL-LiBiO$_2$ are discussed.
