论文标题
通过自旋轨道耦合诱导的非中心对称系统的手性异常
Chiral anomaly in noncentrosymmetric systems induced by spin-orbit coupling
论文作者
论文摘要
手性异常可以在带有韦尔点对的冷凝物质系统中实现。在这里，我们表明，当自旋轨道耦合诱导非零的浆果曲率通量通过费米表面时，手性异常即使没有韦尔点对也可以在不同的非中心系统中实现。这激发了混凝土手性异常，以解释为费米表面特性，而不是韦尔点特性。自旋轨道偶联诱导的异常繁殖了手性异常的众所周知的电荷转运特性，例如负纵向磁磁性和Weyl Semimetals中的平面霍尔效应。由于它具有自旋轨道耦合的起源，因此也会影响自旋传输，并引起异常引起的纵向自旋电流和磁性自旋霍尔效应，而磁性自旋霍尔效应在常规的Weyl Semimetals中不存在。
The chiral anomaly may be realized in condensed matter systems with pairs of Weyl points. Here we show that the chiral anomaly can be realized in diverse noncentrosymmetric systems even without Weyl point pairs when spin-orbit coupling induces nonzero Berry curvature flux through Fermi surfaces. This motivates the condensed matter chiral anomaly to be interpreted as a Fermi surface property rather than a Weyl point property. The spin-orbit-coupling-induced anomaly reproduces the well-known charge transport properties of the chiral anomaly such as the negative longitudinal magnetoresistance and the planar Hall effect in Weyl semimetals. Since it is of spin-orbit coupling origin, it also affects the spin transport and gives rise to anomaly-induced longitudinal spin currents and the magnetic spin Hall effect, which are absent in conventional Weyl semimetals.
