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Impacts of pressure to the structural, electronic and magnetic properties of Dirac semimetal EuMnBi2

Resta A. Susilo, Wen Deng, Jiajia Feng, Aifeng Wang, Naomi Kawamura, Naoki Ishimatsu, Saori Kawaguchi, Mingzhi Yuan, He Li, Weijun Ren, Takeshi Nakagawa, Cedomir Petrovic, and Bin Chen
Phys. Rev. Research 3, 043028 – Published 11 October 2021

Abstract

We report our investigations on the effects of pressure on the electronic and magnetic properties of magnetic Dirac semimetal EuMnBi2 by using electrical transport, synchrotron x-ray diffraction, and x-ray absorption spectroscopy. The antiferromagnetic interaction due to the Eu magnetic moment in EuMnBi2 is enhanced under pressure up to 3.9GPa. The Néel temperature (TN) is found to disappear above 4 GPa and a new transition Tt at around 29 K emerges above 6 GPa. Tt remains relatively constant up to 15 GPa, above which it increases with further compression, reaching 60K at 22 GPa. Eu L-edge x-ray absorption spectroscopy revealed a valence change of Eu toward a trivalent state that begins above 6 GPa, which indicates that Tt is likely related to the valence transition temperature of Eu. Sign reversal of the Hall resistivity above 7 GPa suggests that the valence change of Eu also induces a Fermi surface modification.

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  • Received 23 June 2021
  • Revised 28 August 2021
  • Accepted 23 September 2021

DOI:https://doi.org/10.1103/PhysRevResearch.3.043028

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Resta A. Susilo1,*,†, Wen Deng1,†, Jiajia Feng1, Aifeng Wang2,‡, Naomi Kawamura3, Naoki Ishimatsu4, Saori Kawaguchi3, Mingzhi Yuan1, He Li1, Weijun Ren5, Takeshi Nakagawa6, Cedomir Petrovic2, and Bin Chen1,§

  • 1Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
  • 2Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 3Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
  • 4Graduate School of Advanced Science and Engineering, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
  • 5Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • 6Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China

  • *resta.susilo@hotmail.com; Present address: Department of Physics, Pohang University of Science and Technology, Pohang 37673, Korea.
  • These authors contributed equally to this work.
  • Present address: College of Physics, Chongqing University, Chongqing 401331, China.
  • §chenbin@hpstar.ac.cn

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Vol. 3, Iss. 4 — October - December 2021

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