We study theoretically and experimentally the spin pumping signals induced by the resonance of canted antiferromagnets with Dzyaloshinskii-Moriya interaction and demonstrate that they can generate easily observable inverse spin-Hall voltages. Using a bilayer of hematite/heavy metal as a model system, we measure at room temperature the antiferromagnetic resonance and an associated inverse spin-Hall voltage, as large as in collinear antiferromagnets. As expected for coherent spin pumping, we observe that the sign of the inverse spin-Hall voltage provides direct information about the mode handedness as deduced by comparing hematite, chromium oxide and the ferrimagnet yttrium-iron garnet. Our results open new means to generate and detect spin currents at terahertz frequencies by functionalizing antiferromagnets with low damping and canted moments.

中文翻译：

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倾斜反铁磁体中的室温反铁磁共振和自旋霍尔电压的反向

我们在理论上和实验上研究了由倾斜的反铁磁体与Dzyaloshinskii-Moriya相互作用引起的共振诱导的自旋泵浦信号，并证明了它们可以产生易于观察到的自旋霍尔霍尔反电压。使用赤铁矿/重金属的双层作为模型系统，我们在室温下测量的反铁磁共振和相关的逆自旋霍尔电压，与共线反铁磁体一样大。正如相干自旋泵所期望的那样，我们观察到自旋霍尔霍尔电压的符号提供了关于模式顺手性的直接信息，通过比较赤铁矿，氧化铬和亚铁磁体钇铁石榴石可以推断出这种模式的顺手性。我们的结果为通过以低阻尼和倾斜力矩实现反铁磁体功能化开辟了一种新的手段来生成和检测太赫兹频率下的自旋电流。