论文标题
Weyl半法中量子振荡的阶段
Phase of quantum oscillation in Weyl semimetals
论文作者
论文摘要
在电子轨道位于拓扑半学的Weyl点周围的Fermi-Surpace口袋上时，我们考虑了磁场中电子能量的半经典量化条件，并分析在这种情况下出现的常数$γ$。结果表明，该常数具有通用值，$γ= 0 $，与Weyl Spectrum的倾斜无关。由于费米表面的极端横截面的常数$γ$决定了量子振荡的相位，因此该结果解释了为什么相位的测量值允许一个允许一个晶体中的Weyl点，即使口袋的极端横截面也没有通过该点，并且Orbit的适当berry相位与$π$不同。
We consider the semiclassical quantization condition for the energy of an electron in a magnetic field in the case when the electron orbit lies on a Fermi-surface pocket surrounding the Weyl point of a topological semimetal and analyze the constant $γ$ appearing in this condition. It is shown that this constant has the universal value, $γ=0$, independent of the tilt of the Weyl spectrum. Since the constant $γ$ for an extremal cross section of the Fermi surface determines the phase of quantum oscillations, this result explains why measurements of the phase permit one to find Weyl points in crystals even though the extremal cross section of the pocket does not pass through this point, and the appropriate Berry phase of the orbit differs from $π$.
