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Unconventional transverse transport above and below the magnetic transition temperature in Weyl semimetal EuCd₂As₂

Yang Xu1*, Lakshmi Das2, Junzhang Ma3, Changjiang Yi4, Simin Nie5, Youguo Shi4, Apoorv Tiwari2, Stepan Tsirkin2, Titus Neupert2, Maria Medarde6, Ming Shi7, Johan Chang2, Tian Shang1

1 Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China

2 Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland

3 Department of Physics, City University of Hong Kong, Kowloon, Hong Kong

4 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

5 Department of Materials Science and Engineering, Stanford University, Stanford, California 94035, USA

6 Laboratory for Multiscale Materials Experiments, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

7 Swiss Light Source, Paul Scherrer Institut, Villigen CH-5232, Switzerland

* Corresponding authors emails: xuyangfudan@126.com
DOI10.24435/materialscloud:4f-n7 [version v1]

Publication date: Dec 02, 2021

How to cite this record

Yang Xu, Lakshmi Das, Junzhang Ma, Changjiang Yi, Simin Nie, Youguo Shi, Apoorv Tiwari, Stepan Tsirkin, Titus Neupert, Maria Medarde, Ming Shi, Johan Chang, Tian Shang, Unconventional transverse transport above and below the magnetic transition temperature in Weyl semimetal EuCd₂As₂, Materials Cloud Archive 2021.206 (2021), doi: 10.24435/materialscloud:4f-n7.

Description

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. This record contains the raw data for this manuscript [Physical Review Letters 126, 076602 (2021)].

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File name Size Description
Data-EuCd2As2.zip
MD5md5:43245da89b626c4eaa1e9b5d500ba360
12.5 MiB This record contains the raw data for this manuscript [Physical Review Letters 126, 076602 (2021)]. As magnetic, electrical, and thermoelectrical measurements have been performed, the data files are also divided into these three categories in the .zip file. All data were generated from a Quantum Design magnetic property measurement system (MPMS) and a physical property measurement system (PPMS).
README.txt
MD5md5:c752d068190751fd22e123623d3d71ad
398 Bytes Readme file

License

Files and data are licensed under the terms of the following license: Creative Commons Attribution 4.0 International.
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External references

Journal reference
Y. Xu, L. Das, J. Z. Ma, C. J. Yi, S. M. Nie, Y. G. Shi, A. Tiwari, S. S. Tsirkin, T. Neupert, M. Medarde, M. Shi, J. Chang, and T. Shang, Phys. Rev. Lett. 126, 076602 (2021). doi:https://doi.org/10.1103/PhysRevLett.126.076602

Keywords

anomalous Hall effect anomalous Nernst effect magnetic Weyl semimetal topological spin texture MARVEL/DD6 Experimental

Version history:

2021.206 (version v1) [This version] Dec 02, 2021 DOI10.24435/materialscloud:4f-n7