标题： 磁性材料维度交叉过程中的巨大磁性手性出现 显示英文标题

标题： Emergence of Giant Magnetic Chirality during Dimensionality Crossover of Magnetic Materials

摘要： 手性，是一种对特定手性的内在偏好，是自然界中观察到的基本特性。 在磁学中，磁手性源于反对称的Dzyaloshinskii-Moriya相互作用与对称的Heisenberg交换相互作用之间的竞争。 传统上，反对称相互作用被认为相对于对称相互作用是次要的。 在本研究中，我们展示了在磁性材料从三维到二维的维度交叉过程中观察到的巨大磁手性。 反对称相互作用与对称相互作用之间的比率在此交叉过程中表现出主导地位的反转，推翻了传统的观点。 这一观察结果通过非局域相互作用模型和紧束缚计算得到了理论验证，其中每种交换相互作用在整个交叉过程中采用了不同的配对方案。 额外的实验研究轨道矩的非球性也证实了我们发现的稳健性。 我们的发现突显了维度在塑造磁手性中的关键作用，并为设计具有前所未有的强度的螺旋磁态提供了策略，这对于自旋电子材料的设计至关重要。 显示英文摘要

摘要： Chirality, an intrinsic preference for a specific handedness, is a fundamental characteristic observed in nature. In magnetism, magnetic chirality arises from the anti-symmetric Dzyaloshinskii-Moriya interaction in competition with the symmetric Heisenberg exchange interaction. Traditionally, the anti-symmetric interaction has been considered minor relative to the symmetric interaction. In this study, we demonstrate an observation of giant magnetic chirality during the dimensionality crossover of magnetic materials from three-dimensional to two-dimensional. The ratio between the anti-symmetric and symmetric interactions exhibits a reversal in their dominance over this crossover, overturning the traditional consideration. This observation is validated theoretically using a non-local interaction model and tight-binding calculation with distinct pairing schemes for each exchange interaction throughout the crossover. Additional experiments investigating the asphericity of orbital moments corroborate the robustness of our findings. Our findings highlight the critical role of dimensionality in shaping magnetic chirality and offer strategies for engineering chiral magnet states with unprecedented strength, desired for the design of spintronic materials.