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

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arxiv 1604.00387 v1 pith:QAAR2KGM submitted 2016-04-01 cond-mat.mtrl-sci cond-mat.mes-hallcond-mat.str-el

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

Lijun Li , Kefeng Wang , D. Graf , Limin Wang , Aifeng Wang , C. Petrovic This is my paper
classification cond-mat.mtrl-sci cond-mat.mes-hallcond-mat.str-el
keywords diracbamnbi2fermionsquantumpresenceanisotropicasymmetryband
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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