Unconventional Transverse Transport above and below the Magnetic Transition Temperature in Weyl Semimetal EuCd2As2

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Y. Xu
  • L. Das
  • C. J. Yi
  • S. M. Nie
  • Y. G. Shi
  • A. Tiwari
  • S. S. Tsirkin
  • T. Neupert
  • M. Medarde
  • M. Shi
  • J. Chang
  • T. Shang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number076602
Journal / PublicationPhysical Review Letters
Volume126
Issue number7
Online published18 Feb 2021
Publication statusPublished - 19 Feb 2021

Abstract

As exemplified by the growing interest in the quantum anomalous Hall effect, the research on topology as an organizing principle of quantum matter is greatly enriched from the interplay with magnetism. In this vein, we present a combined electrical and thermoelectrical transport study on the magnetic Weyl semimetal EuCd2As2. Unconventional contribution to the anomalous Hall and anomalous Nernst effects were observed both above and below the magnetic transition temperature of EuCd2As2, indicating the existence of significant Berry curvature. EuCd2As2 represents a rare case in which this unconventional transverse transport emerges both above and below the magnetic transition temperature in the same material. The transport properties evolve with temperature and field in the antiferromagnetic phase in a different manner than in the paramagnetic phase, suggesting different mechanisms to their origin. Our results indicate EuCd2As2 is a fertile playground for investigating the interplay between magnetism and topology, and potentially a plethora of topologically nontrivial phases rooted in this interplay.

Citation Format(s)

Unconventional Transverse Transport above and below the Magnetic Transition Temperature in Weyl Semimetal EuCd2As2. / Xu, Y.; Das, L.; Ma, J. Z.; Yi, C. J.; Nie, S. M.; Shi, Y. G.; Tiwari, A.; Tsirkin, S. S.; Neupert, T.; Medarde, M.; Shi, M.; Chang, J.; Shang, T.

In: Physical Review Letters, Vol. 126, No. 7, 076602, 19.02.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review