Observation of two-dimensional Fermi surface and Dirac dispersion in YbMnSb${}_2$

Abstract

We present the crystal structure, electronic structure, and transport properties of the material YbMnSb${}_2$, a candidate system for the investigation of Dirac physics in the presence of magnetic order. Our measurements reveal that this system is a low-carrier-density semimetal with a 2D Fermi surface arising from a Dirac dispersion, consistent with the predictions of density functional theory calculations of the antiferromagnetic system. The low temperature resistivity is very large, suggesting scattering in this system is highly efficient at dissipating momentum despite its Dirac-like nature.

8 pages, 6 figures

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Cited by in corpus (13)

• Bulk quantum Hall effect of spin-valley-coupled Dirac fermions in a polar antiferromagnet BaMnSb${}_2$
• Magnetic and electronic structure of the topological semimetal YbMnSb${}_2$
• Electronic band structure and surface states in Dirac semimetal LaAgSb${}_2$
• Magnetic tuning of band topology evidenced by exotic quantum oscillations in the Dirac semimetal EuMnSb${}_2$
• Topological Antiferromagnetic Semimetal for Spintronics: A Case Study of a Layered Square Net System EuZnSb${}_2$
• Spin dynamics of a magnetic Weyl semimetal Sr${}_{1-x}$Mn${}_{1-y}$Sb${}_2$
• Magnetotransport studies of the Sb square-net compound LaAgSb${}_2$ under high pressure and rotating magnetic fields
• High-field Studies on Layered Magnetic and Polar Dirac Metals
• Unusual Electronic Structure of Dirac Material BaMnSb${}_2$ Revealed by Angle-Resolved Photoemission Spectroscopy
• Magnetic excitations in the topological semimetal ${\mathrm{YbMnSb}}_2$
• Molecular beam deposition of a new layered pnictide with distorted Sb square nets
• C-type antiferromagnetic structure of topological semimetal CaMnSb${}_2$
• Coupling of magnetism and Dirac fermions in YbMnSb2