论文标题
纵向磁磁的迹象和Weyl半法的平面霍尔效应
The sign of longitudinal magnetoconductivity and the planar Hall effect in Weyl semimetals
论文作者
论文摘要
Weyl半法中手性异常的表现通常依赖于纵向磁性（LMC）以及平面霍尔效应的观察，具有特定的磁场和角度依赖性。在这里，我们在半经典方案中求解玻尔兹曼方程，以用于韦尔半学的原型，从而使Intravalley和Intervalley散射都允许轨道磁矩（OMM）的效果，其中电气和磁场不一定是彼此平行的。我们在相关的参数空间中构造了相图，该空间描述了在OMM和足够强的间隔散射的情况下从正面LMC转移到负LMC的转移，最近仅指出了平行的电场和磁场。另一方面，我们发现，手性异常对平面霍尔效应的贡献始终保持积极状态（与LMC不同），无论包含或排除OMM或Intervelley散射的强度如何。我们的预测可以在实验中直接测试，并且可以用作新的诊断程序来验证Weyl系统中的手性异常。
The manifestation of chiral anomaly in Weyl semimetals typically relies on the observation of longitudinal magnetoconductance (LMC) along with the planar Hall effect, with a specific magnetic field and angle dependence. Here we solve the Boltzmann equation in the semiclassical regime for a prototype of a Weyl semimetal, allowing for both intravalley and intervalley scattering, along with including effects from the orbital magnetic moment (OMM), in a geometry where the electric and magnetic fields are not necessarily parallel to each other. We construct the phase diagram in the relevant parameter space that describes the shift from positive to negative LMC in the presence of OMM and sufficiently strong intervalley scattering, as has been recently pointed out for only parallel electric and magnetic fields. On the other hand, we find that the chiral anomaly contribution to the planar Hall effect always remains positive (unlike the LMC) irrespective of the inclusion or exclusion of OMM, or the strength of the intervalley scattering. Our predictions can be directly tested in experiments, and may be employed as new diagnostic procedures to verify chiral anomaly in Weyl systems.
