Magnetic and electronic structure of Dirac semimetal candidate EuMnSb${}_2$

Abstract

We report an experimental study of the magnetic order and electronic structure and transport of the layered pnictide EuMnSb${}_2$, performed using neutron diffraction, angle-resolved photoemission spectroscopy (ARPES), and magnetotransport measurements. We find that the Eu and Mn sublattices display antiferromagnetic (AFM) order below $T_{\mathrm{N}}^{\mathrm{Eu}}=21(1)$ K and $T_{\mathrm{N}}^{\mathrm{Mn}}=350(2)$ K respectively. The former can be described by an A-type AFM structure with the Eu spins aligned along the $c$ axis (an in-plane direction), whereas the latter has a C-type AFM structure with Mn moments along the $a$--axis (perpendicular to the layers). The ARPES spectra reveal Dirac-like linearly dispersing bands near the Fermi energy. Furthermore, our magnetotransport measurements show strongly anisotropic magnetoresistance, and indicate that the Eu sublattice is intimately coupled to conduction electron states near the Dirac point.

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Cited by in corpus (16)

• Nonlinear spin Hall effect in $\mathcal{P}\mathcal{T}$-symmetric collinear magnets
• Magnetic, thermal, and electronic-transport properties of EuMg2Bi2 single crystals
• Resonant X-ray scattering study of diffuse magnetic scattering from the topological semimetals EuCd${}_2$As${}_2$ and EuCd${}_2$Sb${}_2$
• A-type antiferromagnetic order and magnetic phase diagram of the trigonal Eu spin-7/2 triangular-lattice compound EuSn2As2
• A-type antiferromagnetic order in semiconducting EuMg${}_2$Sb${}_2$ single crystals
• Zero-field magnetic ground state of EuMg${}_2$Bi${}_2$
• Magnetic and electronic structure of the topological semimetal YbMnSb${}_2$
• Canted Antiferromagnetic phases in the layered candidate Weyl material EuMnSb${}_2$
• Magnetic tuning of band topology evidenced by exotic quantum oscillations in the Dirac semimetal EuMnSb${}_2$
• Tuning quantum transport by controlling spin reorientations in Dirac semimetal candidates Eu${}_{1-x}$Sr${}_x$MnSb${}_2$
• Electronic Structure Examination on the Topological Properties of CaMnSb${}_2$ by Angle-Resolved Photoemission Spectroscopy
• High-field Studies on Layered Magnetic and Polar Dirac Metals
• Unusual Electronic Structure of Dirac Material BaMnSb${}_2$ Revealed by Angle-Resolved Photoemission Spectroscopy
• Molecular beam deposition of a new layered pnictide with distorted Sb square nets
• Magnetic excitations in the topological semimetal ${\mathrm{YbMnSb}}_2$
• Field-induced metal-to-insulator transition and colossal anisotropic magnetoresistance in a nearly Dirac material EuMnSb${}_2$