论文标题
揭示抗铁磁体中能带的隐藏自旋极化
Uncovering hidden spin polarization of energy bands in antiferromagnets
论文作者
论文摘要
一些特定的对称性启用了晶体中的许多教科书物理效果。与这种“明显效果”相反，隐藏效果x”是指一般条件，在这种情况下，名义全球系统对称性会不允许x，而晶体内局部扇区的对称性将启用效果x。已知的示例包括隐藏的rashba和/或隐藏的dresselhaus旋转极化，即使是旋转的骨偶联，但不存在的旋转式偶联，但也不存在。反与对称的非磁性晶体。在这里，我们指出，不需要自旋轨道耦合（SOC）的自旋分裂效果可以在抗铁磁铁中具有隐藏的自旋极化对应物。我们表明，这种隐藏的，与SOC无关的效果反映了完美晶体的内在特性，而不是由于缺陷而产生的效果，为实验实现打开了可能性，并提供了一种潜在的方法来切换抗铁磁序。
Many textbook physical effects in crystals are enabled by some specific symmetries. In contrast to such "apparent effects", "hidden effect X" refers to the general condition where the nominal global system symmetry would disallow the effect X, whereas the symmetry of local sectors within the crystal would enable effect X. Known examples include the hidden Rashba and/or hidden Dresselhaus spin polarization that require spin orbit coupling, but (unlike the apparent Rashba and Dresselhaus counterparts) can exist even in inversion-symmetric non-magnetic crystals. Here we point out that the spin splitting effect that does not require spin-orbit coupling (SOC) can have a hidden spin polarization counterpart in antiferromagnets. We show that such hidden, SOC-independent effects reflect intrinsic properties of the perfect crystal rather than an effect due to imperfections, opening the possibility for experimental realization, and offering a potential way to switch antiferromagnetic ordering.
