Zyuzin Vladimir A, Kovalev Alexey A
Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA.
Phys Rev Lett. 2016 Nov 18;117(21):217203. doi: 10.1103/PhysRevLett.117.217203. Epub 2016 Nov 15.
We predict that a temperature gradient can induce a magnon-mediated spin Hall response in an antiferromagnet with nontrivial magnon Berry curvature. We develop a linear response theory which gives a general condition for a Hall current to be well defined, even when the thermal Hall response is forbidden by symmetry. We apply our theory to a honeycomb lattice antiferromagnet and discuss a role of magnon edge states in a finite geometry.
我们预测，温度梯度可在具有非平凡磁振子贝里曲率的反铁磁体中诱导出磁振子介导的自旋霍尔响应。我们发展了一种线性响应理论，该理论给出了霍尔电流明确定义的一般条件，即使热霍尔响应因对称性而被禁止。我们将我们的理论应用于蜂窝晶格反铁磁体，并讨论了有限几何结构中磁振子边缘态的作用。
