Interband Effects of Magnetic Field on Hall Effects for Dirac Electrons in Bismuth

Abstract

Hall effects are investigated for three-dimensional Dirac electrons as a model of bismuth alloys. It is found that there is unconventional contributions to the Hall conductivity ${\sigma }_{xy}$ generated by the interband effects of a magnetic field. This phenomena is remarkable near the band-edge. The Hall coefficient exhibits two unexpected properties; a sharp peak at around the band-edges, and a drastic sign change in the band gap region. Implications of the present results to bismuth alloys are discussed.

4 pages, 3figures

References in corpus (4)

• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Unconventional Integer Quantum Hall effect in graphene
• Signatures of Electron Fractionalization in Ultraquantum Bismuth
• Orbital Magnetism and Transport Phenomena in Two Dimensional Dirac Fermions in Weak Magnetic Field

Cited by in corpus (1)

• First observation of spin-helical Dirac fermions and topological phases in undoped and doped Bi2Te3 demonstrated by spin-ARPES spectroscopy