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Observation of two-dimensional Fermi surface and Dirac dispersion in YbMnSb₂

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arxiv 1708.03308 v1 pith:N3NTNS4D submitted 2017-08-10 cond-mat.mtrl-sci

Observation of two-dimensional Fermi surface and Dirac dispersion in YbMnSb₂

classification cond-mat.mtrl-sci
keywords systemdiracdispersionfermistructuresurfaceybmnsbantiferromagnetic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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