AI 中文总结
研究人员揭示金属室温磁体KV₂Se₂O的(001)表面涌现出d波反常铁磁性，其结果解释了相关矛盾实验证据，并预测了可探测该现象的非线性埃德尔斯坦响应，拓展了反常铁磁性的探测技术。
AI 中文摘要
我们通过\textbf{KV₂Se₂O}中的独特特征，展示了近期提出的涌现表面反常铁磁性概念。研究表明，对于具有体反铁磁有序的\textbf{KV₂Se₂O}，其(001)表面呈现\textit{d}波反常铁磁性。我们的结果完全解释了近期看似矛盾的实验证据：中子衍射独立显示体相为反铁磁有序，而光电子能谱则显示存在\textit{d}波自旋分裂。为充分验证这一概念，我们预测了一个关键实验特征：位于表面的大非线性埃德尔斯坦响应，且该响应遵循\textit{d}波反常铁磁对称性。这些结果不仅与金属性室温磁体\textbf{KV₂Se₂O}相关，还适用于多个其他利布晶格系统。我们的工作拓展了可用于探测反铁磁体表面涌现的反常铁磁性的技术库。
英文摘要
We demonstrate the recent concept of emergent surface altermagnetism through its unique signatures in \KVSO. We show that for bulk antiferromagnetically ordered \KVSO, the (001) surface exhibits $d$-wave altermagnetism. Our results fully explain the recent seemingly contradicgting experimental evidence, independently showing both an antiferromagnetically ordered bulk from neutron diffraction, and $d$-wave spin splitting from photoemission spectroscopy. To fully verify this conecept, we predict, as a key experimental signature, a large nonlinear Edelstein response, which is localized at the surface, and follows the $d$-wave altermagnetic symmetry. These results are not only relevant for the metallic and room-temperature magnet \KVSO, but also for several other Lieb lattice systems. Our work expands the pool of techniques that can be used to detect altermagnetism emerging at the surfaces of antiferromagnets.
Comments12 pages, 6 figures
