论文标题
量子振荡和弱各向异性电阻率在手性速度半明PDGA中
Quantum oscillations and weak anisotropic resistivity in the chiral Fermion semimetal PdGa
论文作者
论文摘要
我们对Crystal PDGA中的Magnetotransport和De Haas-Van Alphen（DHVA）振荡进行了详细分析，该振荡预测是COSI家族的典型手性武装半学。不饱和二次磁磁力（MR）和非线性霍尔电阻率表明PDGA是一个具有电子孔补偿的多带系统。当磁场在（1 $ \ bar {1} $ 0）或（111）平面垂直于电流的（1 $ \ bar {1} $ 0）内旋转时，PDGA中的角度依赖性电阻率显示为弱各向异性，两倍或三倍对称性。分别对B // [001]或B // [011]的DHVA振荡进行快速的傅立叶转换分析（FFT）提取的九个或3个频率，确认与Fermi表面（FSSS）一致。
We perform a detailed analysis of the magnetotransport and de Haas-van Alphen (dHvA) oscillations in crystal PdGa which is predicted to be a typical chiral Fermion semimetal from CoSi family holding a large Chern number. The unsaturated quadratic magnetoresistance (MR) and nonlinear Hall resistivity indicate that PdGa is a multi-band system without electron-hole compensation. Angle-dependent resistivity in PdGa shows weak anisotropy with twofold or threefold symmetry when the magnetic field rotates within the (1$\bar{1}$0) or (111) plane perpendicular to the current. Nine or three frequencies are extracted after the fast Fourier-transform analysis (FFT) of the dHvA oscillations with B//[001] or B//[011], respectively, which is confirmed to be consistent with the Fermi surfaces (FSs) obtained from first-principles calculations with spin-orbit coupling (SOC) considered.
