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Field modulated anomalous Hall conductivity and planar Hall effect in Co3Sn2S2 nanoflakes

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journal contribution
posted on 2020-10-05, 13:58 authored by Shuo-Ying Yang, Jonathan Noky, Jacob Gayles, Fasil DejeneFasil Dejene, Yan Sun, Mathias Dörr, Yurii Skourski, Claudia Felser, Mazhar Nawaz Ali, Enke Liu, Stuart SP Parkin
Time-reversal-symmetry-breaking Weyl semimetals (WSMs) have attracted great attention recently because of the interplay between intrinsic magnetism and topologically nontrivial electrons [1-6]. Here, we present anomalous Hall effect (AHE) and planar Hall effect (PHE) studies on nanoflakes of Co3Sn2S2, a magnetic WSM hosting a stacked Kagome lattice. The reduced thickness modifies the magnetic properties of the nanoflake, resulting in a 15-time larger coercive field compared with the bulk [3], and correspondingly also modifies the transport properties. A 22% enhancement of the intrinsic anomalous Hall conductivity (AHC), as compared to bulk material, was observed. A magnetic field modulated AHC, which may be directly related to the changing Weyl point separation with magnetic field, was also found. Furthermore, we showed that the PHE in a hard magnetic WSM is a complex interplay between ferromagnetism, orbital magnetoresistance and the chiral anomaly. Our findings pave the way for a further understanding of exotic transport features in the burgeoning field of magnetic topological phases.

Funding

Deutsche Forschungsgemeinschaft SPP 1666

National Natural Science Foundation of China (No. 11974394)

Alexander von Humboldt Foundation Sofia Kovalevskaja Award

MINERVA ARCHES Award

History

School

  • Science

Department

  • Physics

Published in

Nano Letters

Volume

11

Pages

7860–7867

Publisher

American Chemical Society (ACS)

Version

  • AM (Accepted Manuscript)

Rights holder

© American Chemical Society

Publisher statement

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.0c02219

Publication date

2020-09-28

Copyright date

2020

ISSN

1530-6984

eISSN

1530-6992

Language

  • en

Depositor

Dr Fasil Kidane Dejene. Deposit date: 3 October 2020

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