Quantum Oscillations and Coherent Interlayer Transport in a New Topological Dirac Semimetal Candidate: YbMnSb${}_2$

Abstract

Dirac semimetals (DSMs), which host Dirac fermions and represent new state of quantum matter, have been studied intensively in condensed matter physics. The exploration of new materials with topological states is im- portant in both physics and materials science. In this article, we report the synthesis and the transport properties of high quality single crystals of YbMnSb${}_2$. YbMnSb${}_2$ is a new compound with metallic behavior. Quantum oscillations, including Shubnikov-de Haas (SdH) oscillation and de Haas-van Alphen (dHvA) type oscillation, have been observed at low temperature and high magnetic field. Small effective masses and nontrivial Berry phase are extracted from the analyses of quantum oscillations, which provide the transport evidence for the possible existence of Dirac fermions in YbMnSb${}_2$. The measurements of angular-dependent interlayer magnetoresistance (MR) indicate the interlayer transport is coherent. The Fermi surface (FS) of YbMnSb${}_2$ possesses quasi-two dimensional (2D) characteristic as determined by the angular dependence of SdH oscillation frequency. These findings suggest that YbMnSb${}_2$ is a new candidate of topological Dirac semimetal.

arXiv comment6 pages, 5 figures, two column

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• Topological Semimetals in Square-Net Materials
• High mobility in a van der Waals layered antiferromagnetic metal
• Magnetic and electronic structure of Dirac semimetal candidate EuMnSb${}_2$
• Electronic and dynamical properties of CeRh${}_2$As${}_2$: Role of Rh${}_2$As${}_2$ layers and expected hidden orbital order
• Magnetic mixed valent semimetal EuZnSb${}_2$ with Dirac states in the band structure
• Observation of topological nodal-line semimetal in YbMnSb2 through optical spectroscopy
• Unusual magnetotransport in holmium monoantimonide
• Magnetic structure and excitations of the topological semimetal YbMnBi${}_2$
• Non-trivial topology in a layered Dirac nodal-line semimetal candidate SrZnSb${}_2$ with distorted Sb square nets
• Dirac Fermions and Possible Weak Antilocalization in LaCuSb${}_2$
• Quantum oscillations in Noncentrosymmetric Weyl semimetals RAlSi (R = Sm and Ce)
• Shubnikov-de Haas Oscillations and Nontrivial Topological State in a New Weyl Semimetal Candidate SmAlSi
• Magnetic and electronic structure of the topological semimetal YbMnSb${}_2$
• Extremely large anomalous Hall conductivity and unusual axial diamagnetism in a quasi-1D Dirac material La${}_3$MgBi${}_5$
• Magnetotransport studies of the Sb square-net compound LaAgSb${}_2$ under high pressure and rotating magnetic fields
• Spin dynamics of a magnetic Weyl semimetal Sr${}_{1-x}$Mn${}_{1-y}$Sb${}_2$
• High-field Studies on Layered Magnetic and Polar Dirac Metals
• Coexistence of Dirac fermion and charge density wave in square-net-based semimetal LaAuSb2
• Observation of quantum oscillations, linear magnetoresistance, and crystalline electric field effect in quasi-two-dimensional PrAgBi${}_2$
• Magnetic excitations in the topological semimetal ${\mathrm{YbMnSb}}_2$
• Shubnikov-de Haas and de Haas-van Alphen oscillations in topological semimetal CaAl4
• Molecular beam deposition of a new layered pnictide with distorted Sb square nets
• Physical properties of the layered $f$-electron van der Waals magnet Ce${}_2$Te${}_5$
• Coupling of magnetism and Dirac fermions in YbMnSb2
• Evidence of Spin-Valley Coupling in Dirac Material BaMnBi2 Probed by Quantum Hall Effect and Nonlinear Hall Effect
• Spin waves in Dirac semimetal Ca${}_{0.6}$Sr${}_{0.4}$MnSb${}_2$ investigated with neutrons by the diffraction method