We report interlayer electronic transport in CaMnBi2 single crystals. Quantum oscillations and angular magnetoresistance suggest coherent electronic conduction and valley polarized conduction of Dirac states. Small cyclotron mass, large mobility of carriers and nontrivial Berry's phase are consistent with the presence of Dirac fermions on the side wall of the warped cylindrical Fermi surface. Similar to SrMnBi2 that features an anisotropic Dirac cone, our results suggest that magnetic field-induced changes in the interlayer conduction are also present in layered bismuth-based materials with zero-energy line in momentum space created by the staggered alkaline earth atoms.
@article{arxiv.1609.04003,
title = {Interlayer electronic transport in CaMnBi$_{2}$ antiferromagnet},
author = {Aifeng Wang and D. Graf and Lijun Wu and Kefeng Wang and E. Bozin and Yimei Zhu and C. Petrovic},
journal= {arXiv preprint arXiv:1609.04003},
year = {2016}
}