论文标题
透明棒的轨道磁矩
Orbital Magnetic Moment of Magnons
论文作者
论文摘要
在实验和应用中，通常考虑镁的自旋磁矩。在本文中，我们确定了一个额外的镁质自由度：\ emph {orbital}磁性时刻是由自旋轨道耦合带来的。他们不一定是共线。因此，即使由于反铁磁性而弥补了总旋转力矩（$ \ vec {m}^\ mathrm {s} = \ vec {0} $），$ \ vec {m}^\ mathrm {o} $可能是非零的。轨道弱铁磁剂的这种情况在具有dzyaloshinskii-Moriya相互作用的范式kagome抗fiferromagnets中实现。我们证明表现出宏伟轨道矩的磁铁无处不在，并提出了用于探测它的传输实验。
In experiments and applications usually the spin magnetic moment of magnons is considered. In this Paper we identify an additional degree of freedom of magnons: an \emph{orbital} magnetic moment brought about by spin-orbit coupling.Our microscopic theory uncovers that spin magnetization $\vec{M}^\mathrm{S}$ and orbital magnetization $\vec{M}^\mathrm{O}$ are independent quantities. They are not necessarily collinear; thus, even when the total spin moment is compensated due to antiferromagnetism ($\vec{M}^\mathrm{S} = \vec{0}$), $\vec{M}^\mathrm{O}$ may be nonzero. This scenario of orbital weak ferromagnetism is realized in paradigmatic kagome antiferromagnets with Dzyaloshinskii-Moriya interaction. We demonstrate that magnets exhibiting a magnonic orbital moment are omnipresent and propose transport experiments for probing it.
