论文标题
电动Dzyaloshinskii-Moriya相互作用的微观起源
Microscopic Origin of the Electric Dzyaloshinskii-Moriya Interaction
论文作者
论文摘要
通过分析分析和基于第一原理的计算，对电dzyaloshinskii-moriya相互作用（EDMI）的微观起源（EDMI）揭幕。与磁性dzyaloshinskii-moriya相互作用（MDMI）相似，EDMI也起源于电子介导的效果，更具体地说是由于某些局部反转对称性破坏而被激活的某些电子跳。但是，发现EDMI能量至少是原子位移中的三阶相互作用，而不是MDMI的磁偶极矩中的双线性。此外，提出了EDMI能量形式，我们发现新型的电拓扑缺陷（即手性电弹板）可能来自此EDMI。因此，阐明EDMI的微观起源有可能导致并解释新型极性拓扑阶段的发现。
The microscopic origin of the electric Dzyaloshinskii-Moriya interaction (eDMI) is unveiled and discussed by analytical analysis and first-principles based calculations. As similar to the magnetic Dzyaloshinskii-Moriya interaction (mDMI), eDMI also originates from electron-mediated effect and more specifically from certain electron hoppings that are being activated due to certain local inversion symmetry breaking. However, the eDMI energy is found to be at least a third-order interaction in atomic displacements instead of bilinear in magnetic dipole moments for mDMI. Furthermore, the eDMI energy form is presented, and we find that novel electrical topological defects (namely, chiral electric bobbers) can arise from this eDMI. Thus unraveling the microscopic origin of eDMI has the potential to lead to, and explain, the discovery of novel polar topological phases.
