Giant anomalous Hall effect in quasi-two-dimensional layered antiferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Co</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>NbS</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Giulia Tenasini, Edoardo Martino, Nicolas Ubrig, Nirmal J. Ghimire, Helmuth Berger, Oksana Zaharko, Fengcheng Wu, J. F. Mitchell, Ivar Martin, László Forró, Alberto F. Morpurgo
Abstract
The authors report experiments on exfoliated crystals of Co1/3NbS2 showing that this material is a likely candidate for Quantum Anomalous Hall Effect, if its thickness can be reduced down to a few atomic monolayers. In particular, they found that Co1/3NbS2 exhibits an anomalous Hall conductance per atomic layer of 0.6 e2 /h, approaching the value expected for the QAHE, as well as a strong anisotropy of the conductivity, indicative of a quasi-2D electronic properties.
Topics & Concepts
Condensed matter physicsQuantum Hall effectQuantum anomalous Hall effectAntiferromagnetismHall effectAnisotropyConductanceMaterials sciencePhysicsQuantum spin Hall effectMagnetoresistanceLayer (electronics)FerromagnetismQuantumElectrical resistivity and conductivityGiant magnetoresistanceMagnetic fieldElectronic structureMagnetizationThermal Hall effectTopological Materials and Phenomena2D Materials and ApplicationsQuantum and electron transport phenomena