publication . Article . Preprint . Other literature type . 2018

Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal

Liu, Enke; Sun, Yan; Kumar, Nitesh; Muechler, Lukas; Sun, Aili; Jiao, Lin; Yang, Shuo-Ying; Liu, Defa; Liang, Aiji; Xu, Qiunan; ...
  • Published: 30 Jul 2018
  • Publisher: Springer Science and Business Media LLC
Abstract
Magnetic Weyl semimetals with broken time-reversal symmetry are expected to generate strong intrinsic anomalous Hall effects, due to their large Berry curvature. Here, we report a magnetic Weyl semimetal candidate Co3Sn2S2 with a quasi-two-dimensional crystal structure consisting of stacked Kagome lattices. This lattice provides an excellent platform for hosting exotic quantum topological states. We observe a negative magnetoresistance that is consistent with the chiral anomaly expected from the presence of Weyl fermions close to the Fermi level. The anomalous Hall conductivity is robust against both increased temperature and charge conductivity, which corrobora...
Subjects
arXiv: Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
free text keywords: Condensed Matter - Materials Science, Article, Hall effect, Semimetal, Fermion, Chiral anomaly, Physics, Fermi level, symbols.namesake, symbols, Condensed matter physics, Berry connection and curvature, Weyl semimetal, Magnetoresistance
Funded by
EC| IDEA HEUSLER!
Project
IDEA HEUSLER!
Inverse Design on an Atomic scale: Multifunctional Heusler compounds!
  • Funder: European Commission (EC)
  • Project Code: 291472
  • Funding stream: FP7 | SP2 | ERC
,
EC| TOPMAT
Project
TOPMAT
Topological Materials: New Fermions, Realization of Single Crystals and their Physical Properties
  • Funder: European Commission (EC)
  • Project Code: 742068
  • Funding stream: H2020 | ERC | ERC-ADG
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