共线交替磁体中的隐藏阻挫：配对涡旋与平衡自旋电流回路
Hidden Frustration in Collinear Altermagnets: Pairing Vortices and Equilibrium Spin Current Loops
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中文总结 AI 辅助
该研究发现共线交替磁体的量子真空可循环，其反常磁子对关联中存在规范不可消除的涡旋-反涡旋对，实空间对应平衡自旋电流回路，证明相关量子结构可编码于共线磁体的压缩真空。
中文摘要 AI 辅助
我们证明，磁体可保持完全共线，但其量子真空仍可循环。在中心对称交替磁体中，对称性允许的局域交错Dzyaloshinskii-Moriya耦合，在动量空间高对称点的反常磁子对关联中引入了规范不可消除的涡旋-反涡旋对。在实空间中，这些隐藏涡旋产生反铁手性的平衡自旋电流阵列，在相邻格点周围反向循环。因此，尽管经典层面存在共线，规范不可消除的阻挫依然存在，且完全存在于量子关联中。我们的结果表明，复杂配对、规范不变通量及平衡回路电流——这些在电子通量相、自旋液体和阻挫量子磁体中出现的结构——可编码在共线磁体的压缩真空中。
英文摘要
We show that a magnet can remain perfectly collinear while its quantum vacuum circulates. In a centrosymmetric altermagnet, a symmetry-allowed locally staggered Dzyaloshinskii-Moriya coupling imprints a gauge-irremovable vortex-antivortex pair into the anomalous magnon pair correlations at high-symmetry points in momentum space. In real space, these hidden vortices produce an antiferrochiral array of equilibrium spin currents circulating oppositely around neighboring plaquettes. Gauge-irremovable frustration therefore survives despite classical collinearity: it exists entirely in the quantum correlations. Our results show that complex pairing, gauge-invariant fluxes, and equilibrium loop currents - structures encountered across electronic flux phases, spin liquids, and frustrated quantum magnets - can be encoded in the squeezed vacuum of a collinear magnet.
