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 σxy 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.
@article{arxiv.0804.0076,
title = {Interband Effects of Magnetic Field on Hall Effects for Dirac Electrons in Bismuth},
author = {Yuki Fuseya and Masao Ogata and Hidetoshi Fukuyama},
journal= {arXiv preprint arXiv:0804.0076},
year = {2009}
}