论文标题
非中心磁性Weyl半法的可调手性
Tunable chirality of noncentrosymmetric magnetic Weyl semimetals
论文作者
论文摘要
即使Weyl半法具有具有明确定义的手性的准粒子的特征，通过与手性相反的手性成对的Weyl Lattice Ferrysions对实验进行了严重阻碍，这通常会导致实验探测器消失的净chirality。在这里，我们表明，当时间反转和反转 - 对称性都被打破时，可以以受控的方式规避此问题。为此，我们调查了碳化物家族RMC $ _2 $（r稀土和M型过渡金属）中的手性 - 疾病，表明几个成员是Weyl Semimetals。使用非中心对称的Ferromagnet NDRHC $ _2 $作为说明示例，我们表明，可以通过正确拆卸其磁化强度来在其费米表面稳定奇数的Weyl节点。倾斜方向决定了由此产生的净手性的标志，从而打开了一个简单的控制路线。
Even if Weyl semimetals are characterized by quasiparticles with well-defined chirality, exploiting this experimentally is severely hampered by Weyl lattice-fermions coming in pairs with opposite chirality, typically causing the net chirality picked up by experimental probes to vanish. Here we show this issue can be circumvented in a controlled manner when both time-reversal- and inversion- symmetry are broken. To this end, we investigate chirality-disbalance in the carbide family RMC$_2$ (R a rare-earth and M a transition metal), showing several members to be Weyl semimetals. Using the noncentrosymmetric ferromagnet NdRhC$_2$ as an illustrating example, we show that an odd number of Weyl nodes can be stabilized at its Fermi surface by properly tilting its magnetization. The tilt direction determines the sign of the resulting net chirality, opening up a simple route to control it.
