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arXiv 1508.04590cond-mat.str-elcond-mat.mes-hallcond-mat.mtrl-scihep-lathep-ph
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自旋轨道耦合反铁磁绝缘体中的手征磁效应和反常霍尔效应

Chiral Magnetic Effect and Anomalous Hall Effect in Antiferromagnetic Insulators with Spin-Orbit Coupling

Akihiko Sekine, Kentaro Nomura

摘要:

我们研究了具有自旋轨道耦合的三维关联系统中的动态磁电现象。我们重点研究了反铁磁绝缘相,其中动力学轴子场是由反铁磁序参量的涨落实现的。结果表明,由于反铁磁共振等序参量的时间依赖性,出现了动态手征磁效应,即由磁场产生的交变电流。研究还表明,反常的霍尔效应是由于反铁磁畴壁等序参量的空间变化引起的。我们的研究表明,自旋-轨道耦合的反铁磁绝缘体中的自旋激发可以导致非平凡的电荷响应。此外,在我们的系统中观察到手征磁效应和反常霍尔效应相当于探测到凝聚态中的动力学轴子场。

英文摘要:

We search for dynamical magnetoelectric phenomena in three-dimensional correlated systems with spin-orbit coupling. We focus on the antiferromagnetic insulator phases where the dynamical axion field is realized by the fluctuation of the antiferromagnetic order parameter. It is shown that the dynamical chiral magnetic effect, an alternating current generation by magnetic fields, emerges due to the time dependences of the order parameter such as antiferromagnetic resonance. It is also shown that the anomalous Hall effect arises due to the spatial variations of the order parameter such as antiferromagnetic domain walls. Our study indicates that spin excitations in antiferromagnetic insulators with spin-orbit coupling can result in nontrivial charge responses. Moreover, observing the chiral magnetic effect and anomalous Hall effect in our system is equivalent to detecting the dynamical axion field in condensed matter.

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。

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