arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.15512cond-mat.mes-hallcond-mat.str-el
收藏

反铁磁/重金属异质结中的电子-磁振子自旋转换和磁振子自旋泵

Electron-magnon spin conversion and magnonic spin pumping in antiferromagnet/heavy metal heterostructure

Xi-guang Wang, Yao-Zhuang Nie, L. Chotorlishvili, Qing-lin Xia, J. Berakdar, Guang-hua Guo

摘要:

研究了有限温度下反铁磁体与重金属界面上电子自旋与磁振子自旋的交换。基本的物理机制是基于自旋扭矩与创建/湮灭的热磁振子与右手和左手极化。产生/湮灭过程强烈地依赖于电子的极化和磁振子自旋之间的相对取向。对于一个足够强的自旋转移力矩(STT),转换过程变得非线性,产生一个非零的净自旋泵浦电流的原子力显微镜,可以检测到在相邻的金属层。施加外部磁场使得可以操纵STT驱动热自旋泵浦。我们的理论结果是实验上可行的,是一个直接相关的反铁磁基自旋电子器件。

英文摘要:

We study the exchange between electron and magnon spins at the interface of an antiferromagnet and a heavy metal at finite temperatures. The underlying physical mechanism is based on spin torque associated with the creation/annihilation of thermal magnons with right-hand and left-hand polarization. The creation/annihilation process depends strongly on the relative orientation between the polarization of the electron and the magnon spins. For a sufficiently strong spin transfer torque (STT), the conversion process becomes nonlinear, generating a nonzero net spin pumping current in the AFM that can detected in the neighboring metal layer. Applying an external magnetic field renders possible the manipulation of the STT driving thermal spin pumping. Our theoretical results are experimentally feasible and are of a direct relevance to antiferromagnet-based spintronic devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑