论文标题
自旋中性隧道异常效果
Spin-Neutral Tunneling Anomalous Hall Effect
论文作者
论文摘要
异常大厅效应（AHE）是一种基本的自旋依赖性传输特性，可广泛用于旋转。通常可以预期，携带净自旋极化的电流才能驱动AHE。在这里，我们证明，与这种普遍的期望相反，可以在旋转旋转的不良电流驱动的旋转中性隧道AHE（TAHE），即可以在抗铁磁（AFM）隧道隧道交界处实现的tahe，该隧道隧道隧道隧道交界处由非固定式式金属表面和强度分离的AFM电极与正常的金属分离的旋转器与正常的金属分离，而不是旋转器。 （SOC）。 AFM电极与SOC屏障之间的对称不匹配导致自旋依赖性动量滤波对自旋中性纵向电流产生每个电极中的横向霍尔电流。我们在AFM隧道交界处预测，具有RUO $ _ {2} $ - 键入AFM电极和SNTE型SOC屏障的相当大的自旋中性tahe，并表明霍尔电流可通过NéelVectorSwitching逆转。随着霍尔角度与常规AHE散装材料相当，预测的自旋中性tahe可用于抗铁磁性旋转的néel矢量检测。
Anomalous Hall effect (AHE) is a fundamental spin-dependent transport property that is widely used in spintronics. It is generally expected that currents carrying net spin polarization are required to drive the AHE. Here we demonstrate that, in contrast to this common expectation, a spin-neutral tunneling AHE (TAHE), i.e. a TAHE driven by spin-neutral currents, can be realized in an antiferromagnetic (AFM) tunnel junction where an AFM electrode with a non-spin-degenerate Fermi surface and a normal metal electrode are separated by a non-magnetic barrier with strong spin-orbit coupling (SOC). The symmetry mismatch between the AFM electrode and the SOC barrier results in an asymmetric spin-dependent momentum filtering of the spin-neutral longitudinal current generating the transverse Hall current in each electrode. We predict a sizable spin-neutral TAHE in an AFM tunnel junction with a RuO$_{2}$-type AFM electrode and a SnTe-type SOC barrier and show that the Hall currents are reversible by the Néel vector switching. With the Hall angle being comparable to that in conventional AHE bulk materials, the predicted spin-neutral TAHE can be used for the Néel vector detection in antiferromagnetic spintronics.
