Observation of quantum oscillations, linear magnetoresistance, and crystalline electric field effect in quasi-two-dimensional PrAgBi${}_2$

Abstract

We report the magnetic and magnetotransport properties with electronic band structure calculation of the Bi square net system PrAgBi${}_2$. The magnetization and heat capacity data confirm the presence of a crystalline electric field (CEF) effect in PrAgBi${}_2$. Analysis of the CEF effect using a multilevel energy scheme reveals that the ground state of PrAgBi${}_2$ consists of five singlets and two doublets. The de Haas-van Alphen (dHvA) quantum oscillations data show a single frequency with a very small cyclotron effective mass of approximately 0.11 $m_e$. A nontrivial Berry phase is also observed from the quantum oscillations data. The magnetotransport data shows linear and unsaturated magnetoresistance, reaching up to 1060\% at 2 K and 9 T. Notably, there is a crossover from a weak-field quadratic dependence to a high-field linear dependence in the field-dependent magnetoresistance data. The crossover critical field $B^{\ast }$ follows the quadratic temperature dependence, indicating the existence of Dirac fermions. The band structure calculation shows several Dirac-like linear band dispersions near the Fermi level and a Dirac point close to the Fermi level, located at the Brillouin zone boundary. \textit{Ab inito} calculations allowed us to ascribe the observed dHvA oscillation frequency to a particular feature of the Fermi surface. Our study suggests layered PrAgBi${}_2$ is a plausible candidate for hosting the CEF effect and Dirac fermion in the Bi square net.

arXiv comment12 pages, 6 figures

References in corpus (33)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• The electronic properties of graphene
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Quantum ESPRESSO toward the exascale
• Topological nodal-line fermions in ZrSiSe and ZrSiTe
• FermiSurfer: Fermi-surface viewer providing multiple representation schemes
• Anisotropic Dirac fermions in a Bi square net of SrMnBi2
• Electronic Transport and quantum oscillation of Topological Semimetals
• Numerical extraction of de Haas - van Alphen frequencies from calculated band energies
• Quantum Hall effect in a bulk antiferromagnet EuMnBi${}_2$ with magnetically confined two-dimensional Dirac fermions
• Topological Semimetals in Square-Net Materials
• Topologically protected surface states in a centrosymmetric superconductor beta-PdBi2
• Two dimensional Dirac fermions and quantum magnetoresistance in CaMnBi${}_2$
• Electron and hole Dirac cone states in-pairs in Ba(FeAs)${}_2$ confirmed by magnetoresistance
• Anisotropic Dirac electronic structures of AMnBi${}_2$ (A=Sr, Ca)
• Effect of Eu magnetism on the electronic properties of the candidate Dirac material EuMnBi2
• The role of delocalized chemical bonding in square-net-based topological semimetals
• Coupling of magnetic order to planar Bi electrons in the anisotropic Dirac metals AMnBi2 (A = Sr, Ca)
• Nontrivial Berry phase in magnetic BaMnSb2 semimetal
• Quantum Oscillations and Coherent Interlayer Transport in a New Topological Dirac Semimetal Candidate: YbMnSb${}_2$
• Multiband effects and the possible Dirac states in LaAgSb${}_2$
• Interplay of Dirac electrons and magnetism in AMnBi2 (A=Ca, Sr)
• Electron-hole asymmetry, Dirac fermions, and quantum magnetoresistance in BaMnBi2
• Quasi-two-dimensional Dirac fermions and quantum magnetoresistance in LaAgBi${}_2$
• Extended Kohler${}^{,}$s Rule of Magnetoresistance
• Bulk quantum Hall effect of spin-valley-coupled Dirac fermions in a polar antiferromagnet BaMnSb${}_2$
• Superconductivity in CaBi${}_2$
• Observation of Dirac-like band dispersion in LaAgSb${}_2$
• Crystalline electric field of Ce in trigonal symmetry: CeIr3Ge7 as a model case
• Magnetic, thermodynamic, and magnetotransport properties of CeGaGe and PrGaGe single crystals
• The de Hass-van Alphen quantum oscillations in a three-dimensional Dirac semimetal TiSb2
• Canted Antiferromagnetic phases in the layered candidate Weyl material EuMnSb${}_2$
• Electronic Structure Examination on the Topological Properties of CaMnSb${}_2$ by Angle-Resolved Photoemission Spectroscopy

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