Magnetotransport study of Dirac fermions in YbMnBi2 antiferromagnet

We report quantum transport and Dirac fermions in YbMnBi2 single crystals. YbMnBi2 is a layered material with anisotropic conductivity and magnetic order below 290 K. Magnetotransport properties, nonzero Berry phase, and small cyclotron mass indicate the presence of Dirac fermions. Angular-dependent...

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Bibliographic Details
Published in:Physical review. B 2016-10, Vol.94 (16), p.165161
Main Authors: Wang, Aifeng, Zaliznyak, I, Ren, Weijun, Wu, Lijun, Graf, D, Garlea, V O, Warren, J B, Bozin, E, Zhu, Yimei, Petrovic, C
Format: Article
Language:English
Subjects:
Antiferromagnetism
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Cyclotrons
Fermi surfaces
Fermions
Magnetic properties
Magnetoresistance
Magnetoresistivity
Quantum mechanics
Quantum transport
Single crystals
Spin-orbit interactions
Transport properties
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Summary:We report quantum transport and Dirac fermions in YbMnBi2 single crystals. YbMnBi2 is a layered material with anisotropic conductivity and magnetic order below 290 K. Magnetotransport properties, nonzero Berry phase, and small cyclotron mass indicate the presence of Dirac fermions. Angular-dependent magnetoresistance indicates a possible quasi-two-dimensional Fermi surface, whereas the deviation from the nontrivial Berry phase expected for Dirac states suggests the contribution of parabolic bands at the Fermi level or spin-orbit coupling.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.94.165161