论文标题
拓扑厅的旋转厅电导率
Spin Hall conductivity in topological Dirac semimetals
论文作者
论文摘要
从理论上讲，我们在拓扑迪拉克半学（TDSM）中研究了旋转霍尔电导率（SHC），其狄拉克点受旋转对称性的保护。在系统的一般相图上，具有时间反转，反转和四倍的旋转对称性，我们揭示了SHC对系统所属的相位敏感。相位和SHC的特征是镜面数量以及无间隙散装点的存在或不存在。还发现，代表性的TDSM CD $ _3 $ AS $ _2 $支持大而负的SHC $σ_{Xy}^Z \ SIM -10^4（\ Hbar/e）（\ hbar/e）（ω。\ textrm {m}）^{ - 1} $。还解释了SHC对相图的依赖性背后的原理。
We theoretically investigate the spin Hall conductivity (SHC) in topological Dirac semimetals (TDSMs) whose Dirac points are protected by rotational symmetry. On the basis of a general phase diagram of the system with time-reversal, inversion and four-fold rotational symmetries, we reveal that the SHC is sensitive to the phase to which the system belong. The phase and the SHC are characterized by the mirror Chern numbers and the presence or absence of gapless bulk Dirac points. It is also found that the representative TDSM Cd$_3$As$_2$ supports a large and negative SHC $σ_{xy}^z\sim -10^4 (\hbar/e) (Ω.\textrm{m})^{-1}$. The principle behind the dependency of SHC on the phase diagram is also explained.
