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arXiv · 2203.12772

Quantum oscillations and weak anisotropic resistivity in the chiral Fermion semimetal PdGa

Xiang-Yu Zeng·Zheng-Yi Dai·Sheng Xu·Ning-Ning Zhao·Huan Wang·Xiao-Yan Wang·Jun-Fa Lin·Jing Gong·Xiao-Ping Ma·Kun Han·Yi-Ting Wang·Peng Cheng·Kai Liu·Tian-Long Xia
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Abstract

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.

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Xiang-Yu Zeng, Zheng-Yi Dai, Sheng Xu, Ning-Ning Zhao, Huan Wang, Xiao-Yan Wang, Jun-Fa Lin, Jing Gong, Xiao-Ping Ma, Kun Han, Yi-Ting Wang, Peng Cheng, Kai Liu, Tian-Long Xia. 2022-03-23. Quantum oscillations and weak anisotropic resistivity in the chiral Fermion semimetal PdGa. https://doi.org/10.1103/physrevb.106.205120

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