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Electron-hole asymmetry, Dirac fermions, and quantum magnetoresistance in BaMnBi2

We report two-dimensional quantum transport and Dirac fermions in BaMnBi2 single crystals. BaMnBi2 is a layered bad metal with highly anisotropic conductivity and magnetic order below 290 K. Magnetotransport properties, nonzero Berry phase, small cyclotronmass, and the first-principles band structure calculations indicate the presence of Dirac fermions in Bi square nets. Quantum oscillations in the Hall channel suggest the presence of both electron and hole pockets, whereas Dirac and parabolic states coexist at the Fermi level.

preprint2016arXivOpen access
Lijun LiKefeng WangD. GrafLimin WangAifeng WangC. Petrovic
cond-mat.mes-hallcond-mat.str-elcond-mat.mtrl-sci
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Open access6 authors3 topics
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Lijun LiKefeng WangD. GrafLimin WangAifeng WangC. Petrovic

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