论文标题
从绝缘抗fiferromagnet中旋转旋转
Subterahertz spin pumping from an insulating antiferromagnet
论文作者
论文摘要
自旋转移扭矩和自旋大厅效应以及它们的倒数现象，自旋泵送和旋转霍尔（ISHE）效应，使旋转型磁矩的读取和控制能力。在基于抗铁磁的设备中，对这些效应的直接观察仍然难以捉摸。我们在单轴绝缘抗铁磁铁MNF2和铂的界面上报告了亚曲霉的旋转泵。在铂层中自旋荷利转化率产生的测得的ISHE电压取决于抗铁磁体的动态模式的手性，该模式通过圆形极化的Sub-Thz辐照的触觉选择性激发和调节。我们的结果为在THZ频率下受控一致的纯旋转电流打开了大门。
Spin-transfer torque and spin Hall effects combined with their reciprocal phenomena, spin-pumping and inverse spin Hall (ISHE) effects, enable the reading and control of magnetic moments in spintronics. The direct observation of these effects remains elusive in antiferromagnetic-based devices. We report sub-terahertz spin-pumping at the interface of a uniaxial insulating antiferromagnet MnF2 and platinum. The measured ISHE voltage arising from spin-charge conversion in the platinum layer depends on the chirality of the dynamical modes of the antiferromagnet, which is selectively excited and modulated by the handedness of the circularly polarized sub-THz irradiation. Our results open the door to the controlled generation of coherent pure spin currents at THz frequencies.
