论文标题
MNBI2TE4和PT的双层中的非旋转运输
Nonreciprocal transport in a bilayer of MnBi2Te4 and Pt
论文作者
论文摘要
MNBI2TE4（MBT）是第一个具有自旋摩托杆锁定表面电子和内在磁性相互作用的固有磁性绝缘子，并且表现出新颖的磁性和拓扑现象。最近的研究表明，由于不可避免的结构缺陷，电子和磁性的相互作用可能会受到表面掺杂的BI2TE3相的影响。在这里，我们报告了由抗铁磁MBT和非磁性PT组成的双层中的非偏位转运，即电流依赖性抗性。 Néel温度以下的非邻次响应的出现证实了MBT表面状态下非肾上腺素和固有磁性的相关性。非偏位转运的角度依赖性表明非邻次响应起源于磁蛋白介导的MBT表面的电子的不对称散射。我们的工作提供了对固有磁性绝缘体中磁力与狄拉克表面电子之间相关性引起的非偏二次的见解。
MnBi2Te4 (MBT) is the first intrinsic magnetic topological insulator with the interaction of spin-momentum locked surface electrons and intrinsic magnetism, and it exhibits novel magnetic and topological phenomena. Recent studies suggested that the interaction of electrons and magnetism can be affected by the Mn-doped Bi2Te3 phase at the surface due to inevitable structural defects. Here we report an observation of nonreciprocal transport, i.e. current-direction-dependent resistance, in a bilayer composed of antiferromagnetic MBT and nonmagnetic Pt. The emergence of the nonreciprocal response below the Néel temperature confirms a correlation between nonreciprocity and intrinsic magnetism in the surface state of MBT. The angular dependence of the nonreciprocal transport indicates that nonreciprocal response originates from the asymmetry scattering of electrons at the surface of MBT mediated by magnon. Our work provides an insight into nonreciprocity arising from the correlation between magnetism and Dirac surface electrons in intrinsic magnetic topological insulators.
