论文标题
由非共线磁体的镁粘结相互作用引起的镁阻力
Magnon drag induced by magnon-magnon interactions characteristic of noncollinear magnets
论文作者
论文摘要
非共线磁铁由形成非共线自旋结构的磁矩组成。由于这种结构，少镁质的哈密顿量获得了立方术语。尽管三次术语是非共线磁体的磁杆相互作用的特征，但尚未阐明它们对木元转运的影响。在这里，我们表明，在一个倾斜的抗铁磁铁中，立方术语会引起镁阻力，使镁拖动镁旋转电流和加热电流，可用于通过调谐磁场来增强这些电流。对于强磁场，我们发现三次术语诱导了自旋表相位系数的低温峰，镁电导率和镁电导率，并且每个值的数量级比非相互作用值大。这种增强主要是由于磁场术语通过磁场依赖的倾斜角的耦合常数的磁场依赖性。我们的木纳阻力提供了一种通过多体效应来控制非磁性磁铁的磁通电流的方法。
A noncollinear magnet consists of the magnetic moments forming a noncollinear spin structure. Because of this structure, the Hamiltonian of magnons acquires the cubic terms. Although the cubic terms are the magnon-magnon interactions characteristic of noncollinear magnets, their effects on magnon transport have not been clarified yet. Here we show that in a canted antiferromagnet the cubic terms cause a magnon drag that magnons drag magnon spin current and heat current, which can be used to enhance these currents by tuning a magnetic field. For a strong magnetic field, we find that the cubic terms induce low-temperature peaks of a spin-Seebeck coefficient, a magnon conductivity, and a magnon thermal conductivity, and that each value is one order of magnitude larger than the noninteracting value. This enhancement is mainly due to the magnetic field dependence of the coupling constant of the cubic terms through the magnetic-field dependent canting angle. Our magnon drag offers a way for controlling the magnon currents of noncollinear magnets via the many-body effect.
