Manipulating magnetism in the Weyl semimetal candidate EuCd<sub>2</sub>As<sub>2</sub> by varying growth conditions and doping

ORAL

Abstract

EuCd2As2 is predicted to host a pair of Weyl points, and Weyl cone like features which may arise from ferromagnetic fluctuations have been observed. [1,2] Here, we present the synthesis details and characterization of single crystals of EuCd2As2 that, with varying initial stoichiometries, can be tuned from an antiferromagnetic ground state (TN ~ 9.5 K) to a ground state with a clear ferromagnetic component (TC ~ 30 K). [3] We have further attempted to understand this variation in magnetic behavior by doping Na on the Eu site. Magnetization, magneto-optical Kerr rotation, specific heat and resistivity data will be presented and discussed.
1. Wang, L.-L. et. al., Phys. Rev. B 99, 245147 (2019).
2. Ma, J.-Z. et. al., Science Advances, Vol. 5, no. 7, (2019)
3. Jo, N. H. et. al., Phys. Rev. B 101, 140402(R) (2020).

*Work at the Ames Laboratory was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. The Ames Laboratory is operated for the U.S. DOE by Iowa State University under Contract No. DEAC0207CH11358. This work was partially supported by the Center for Advancement of Topological Semimetals, an Energy Frontier Research Center funded by the U.S. DOE, Office of Basic Energy Sciences.

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Presenters

  • Brinda Kuthanazhi

    • Department of Physics and Astronomy, Ames Laboratory, Iowa State University
    • Ames Laboratory, Iowa State University
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory/Iowa State University

Authors

  • Brinda Kuthanazhi

    • Department of Physics and Astronomy, Ames Laboratory, Iowa State University
    • Ames Laboratory, Iowa State University
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory/Iowa State University

  • Na Hyun Jo

    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory/Iowa State University

  • Yun Wu

    • Ames Laboratory/Iowa State University

  • Tae-Hoon Kim

    • Ames Laboratory

  • Lin Zhou

    • Ames Laboratory

  • Erik I Timmons

    • Iowa State University
    • Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory/Iowa State University
    • Ames Lab

  • Lin-Lin Wang

    • Ames Laboratory
    • Ames Laboratory/Iowa State University
    • Department of Physics and Astronomy, Ames Laboratory, Iowa State University
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory

  • Andriy Palasyuk

    • Ames Laboratory

  • Kyungchan Lee

    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory/Iowa State University

  • Benjamin Schrunk

    • Ames Laboratory/Iowa State University

  • Benjamin Ueland

    • Ames Lab
    • Physics and Astronomy, Iowa State University/Ames Laboratory
    • Division of Materials Science & Engineering, Ames Laboratory
    • Ames Laboratory and Iowa State University, Ames, IA USA 50011
    • Ames Laboratory/Iowa State University

  • Robert J McQueeney

    • Ames Lab
    • Physics and Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics and Astronomy, Ames Laboratory, Iowa State University
    • Ames Lab/Iowa State
    • Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, USA
    • Iowa State University
    • Ames Laboratory and Iowa State University, Ames, IA USA 50011
    • Ames Laboratory/Iowa State University

  • Anton Burkov

    • University of Waterloo
    • Department of Physics and Astronomy, University of Waterloo

  • Dominic H Ryan

    • Physics, McGill University
    • Physics Department and Centre for the Physics of Materials, McGill University
    • McGill University

  • Ruslan Prozorov

    • Iowa State University
    • Ames Laboratory, Ames, IA
    • Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory
    • Ames Laboratory/Iowa State University
    • Ames Lab

  • Sergey L. Bud'ko

    • Department of Physics and Astronomy, Ames Laboratory, Iowa State University
    • Ames Laboratory, Iowa State University
    • Ames Laboratory, Iowa State University, Dept. of Physics and Astronomy, Ames
    • Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory/Iowa State University

  • Adam Kaminski

    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory/Iowa State University

  • Paul C Canfield

    • Iowa State University/ Ames Laboratory
    • Ames Laboratory
    • Ames Laboratory, Iowa State University
    • Iowa State University
    • Ames Lab/Iowa State
    • Ames Laboratory, Ames, IA
    • Iowa State University/AmesLab
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory/Iowa State University