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Quantum Hall effect in a bulk antiferromagnet EuMnBi$_2$ with magnetically confined two-dimensional Dirac fermions
- Source :
- Science Advances
- Publication Year :
- 2017
- Publisher :
- arXiv, 2017.
-
Abstract
- For the innovation of spintronic technologies, Dirac materials, in which the low-energy excitation is described as relativistic Dirac fermions, are one of the most promising systems, because of the fascinating magnetotransport associated with the extremely high mobility. To incorporate Dirac fermions into spintronic applications, their quantum transport phenomena are desired to be manipulated to a large extent by magnetic order in a solid. We here report a bulk half-integer quantum Hall effect in a layered antiferromagnet EuMnBi$_2$, in which field-controllable Eu magnetic order significantly suppresses the interlayer coupling between the Bi layers with Dirac fermions. In addition to the high mobility more than 10,000 cm$^2$/Vs, Landau level splittings presumably due to the lifting of spin and valley degeneracy are noticeable even in a bulk magnet. These results will pave a route to the engineering of magnetically functionalized Dirac materials.<br />Comment: 26 pages, 4 figures, 1 table
- Subjects :
- Helical Dirac fermion
High Energy Physics::Lattice
Material Properties
Dirac (software)
FOS: Physical sciences
02 engineering and technology
Quantum Hall effect
01 natural sciences
Condensed Matter - Strongly Correlated Electrons
symbols.namesake
Quantum mechanics
0103 physical sciences
magnetoresistance
spin flop transition
010306 general physics
Dirac sea
europium
Research Articles
Berry’s phase
Spin-½
spintronics
Physics
Condensed Matter - Materials Science
Multidisciplinary
Condensed matter physics
Spintronics
Strongly Correlated Electrons (cond-mat.str-el)
Dirac fermions
SciAdv r-articles
Materials Science (cond-mat.mtrl-sci)
Landau quantization
Models, Theoretical
021001 nanoscience & nanotechnology
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Bi square net
quantum hall effect
Dirac fermion
resonant x-ray magnetic scattering
symbols
layered antiferromagnet
0210 nano-technology
Research Article
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Science Advances
- Accession number :
- edsair.doi.dedup.....4be8d413bd6deb76360f6ef1e192c2b9
- Full Text :
- https://doi.org/10.48550/arxiv.1703.04127