Browsing by Author "Jang, Sooyoung"
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Item Observation of a Two-Dimensional Fermi Surface and Dirac Dispersion in YbMnSb₂(Amer Physical Soc, 2018-10-22) Kealhofer, Robert; Jang, Sooyoung; Griffin, Sinead M.; John, Caolan; Benavides, Katherine A.; Doyle, Spencer; Helm, T.; Moll, Philip J. W.; Neaton, Jeffrey B.; Chan, Julia Y.; Denlinger, J. D.; Analytis, James G.; 0000-0003-4434-2160 (Chan, JY); Benavides, Katherine A.; Chan, Julia Y.We present the crystal structure, electronic structure, and transport properties of the material YbMnSb₂, 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 two-dimensional 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 that scattering in this system is highly efficient at dissipating momentum despite its Dirac-like nature.