在反铁磁双层结构中构建可调谐p波磁性

中文摘要 AI 辅助

我们提出一种对称性引导的方法，在由两个AB堆叠反铁磁方格组成的双层系统中构建可调谐p波磁性，该双层系统的共线磁矩互不平行。研究表明，两层之间的面内相对位移会选择性破坏保护自旋简并的对称性，同时保留时间反演相关约束，从而在无自旋轨道耦合的完全补偿磁态中产生奇宇称自旋分裂。所得p波自旋分裂的方向和大小，以及相关的自旋响应，可通过面内位移连续调谐，为控制提供潜在旋钮。我们进一步将该双层系统映射到有效键调制方格，并在平均场框架下研究相应的哈伯德模型。计算得到的相图显示，存在扩展区域，其中具有共面或手性自旋结构的p波磁性会自发出现。我们的结果为在二维系统中实现和操控p波磁性建立了最小的平衡平台。

英文摘要

We propose a symmetry-guided route to engineer tunable $p$-wave magnetism in a bilayer system composed of two AB-stacked antiferromagnetic square lattices with their collinear moments nonparallel to each other. We show that an in-plane relative shift between the two layers selectively breaks the symmetries protecting spin degeneracy while preserving time-reversal-related constraints, thereby generating odd-parity spin splitting in a fully compensated magnetic state without spin-orbit coupling. The direction and the magnitude of the resulting $p$-wave spin-splitting, together with the associated spin responses, can be continuously tuned by the in-plane displacement, providing a potential knob for control. We further map the bilayer system onto an effective bond-modulated square lattice and investigate the corresponding Hubbard model within a mean-field framework. The calculated phase diagram reveals extended regions where $p$-wave magnetism with coplanar or chiral spin textures emerges spontaneously. Our results establish a minimal equilibrium platform for realizing and manipulating $p$-wave magnetism in two-dimensional systems.

发表机构

• College of Mathematics and Physics, Ningde Normal University（宁德师范学院数学与物理学院）
• Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）
• Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences（中国科学院合肥物质科学研究院强磁场科学中心凝聚态物理极端条件安徽省重点实验室）
• Department of Physics, Boston College（波士顿学院物理系）
• School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）

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