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Anomalous Hall effect in Weyl semimetal half-Heusler compounds RPtBi (R = Gd and Nd)
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(2018) Anomalous Hall effect in Weyl semimetal half-Heusler compounds RPtBi (R = Gd and Nd). Proceedings of the National Academy of Sciences of the United States of America, 115 (37). pp. 9140-9144. 201810842. doi:10.1073/pnas.1810842115 ISSN 0027-8424.
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Official URL: http://dx.doi.org/10.1073/pnas.1810842115
Abstract
GdPtBi and NdPtBi belong to the Heusler family of compounds and are conventional antiferromagnets below 9 and 2.1 K, respectively. We present evidence for magnetic-field–induced Weyl physics in these compounds, namely, a chiral anomaly (negative magnetoresistance) and an anomalous Hall effect (AHE) with a large anomalous Hall angle over a wide range of temperature. The AHE and chiral anomaly have a similar temperature dependence, indicating their common origin. These studies plus band structure calculations reveal that GdPtBi and NdPtBi develop Weyl points in the presence of an external magnetic field that arises from an exchange field. Our observations open the path to the realization of the quantum AHE in antiferromagnetic Heusler thin films.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QC Physics | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||
Library of Congress Subject Headings (LCSH): | Hall effect, Antiferromagnetism, Semimetals | ||||||||||||
Journal or Publication Title: | Proceedings of the National Academy of Sciences of the United States of America | ||||||||||||
Publisher: | National Academy of Sciences | ||||||||||||
ISSN: | 0027-8424 | ||||||||||||
Official Date: | 11 September 2018 | ||||||||||||
Dates: |
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Volume: | 115 | ||||||||||||
Number: | 37 | ||||||||||||
Page Range: | pp. 9140-9144 | ||||||||||||
Article Number: | 201810842 | ||||||||||||
DOI: | 10.1073/pnas.1810842115 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
Date of first compliant deposit: | 4 September 2018 | ||||||||||||
Date of first compliant Open Access: | 28 February 2019 | ||||||||||||
RIOXX Funder/Project Grant: |
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