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

Lijun Li; Kefeng Wang; D. Graf; Limin Wang; Aifeng Wang; C. Petrovic

doi:10.1103/PhysRevB.93.115141

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

Materials Science 2016-04-04 v1 Mesoscale and Nanoscale Physics Strongly Correlated Electrons

Authors: Lijun Li , Kefeng Wang , D. Graf , Limin Wang , Aifeng Wang , C. Petrovic

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

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.

Keywords

BaMnBi2 Dirac fermions electron-hole asymmetry quantum magnetoresistance quantum oscillations band structure magnetic order

Cite

@article{arxiv.1604.00387,
  title  = {Electron-hole asymmetry, Dirac fermions, and quantum magnetoresistance in BaMnBi2},
  author = {Lijun Li and Kefeng Wang and D. Graf and Limin Wang and Aifeng Wang and C. Petrovic},
  journal= {arXiv preprint arXiv:1604.00387},
  year   = {2016}
}

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

Abstract

Keywords

Cite

Related papers