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Angle resolved photoemission spectrocopy study on EuCd<sub>2</sub>As<sub>2</sub>

ORAL

Abstract

Recently, DFT calculations on EuCd2As2 in a FM ordered state with Eu moments alligned along the c-axis revealed a single pair of Weyl points. However, previous experimental studies on EuCd2As2 show that the magnetism is an A-type AFM with TN ~ 9.5 K. Here, by discovering and taking advantage of EuCd2As2 chemical tunability, we report successful growths of single crystals of EuCd2As2 with two different magnetic ground states: FM-EuCd2As2 and AFM-EuCd2As2. Angle resolved photoemission spectrocopy shows an anomalous suppression of scattering in ferromagnetic Weyl semimetal candidate EuCd2As2. Unexpectedly, scattering rate is suppressed only in one of the bands over limited energy range that is controlled by presence of another, completely filled band. Such selectivity is highly unusual and can have potential impact on spin transport.

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Presenters

  • Na Hyun Jo

    Ames Laboratory, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy

Authors

  • Na Hyun Jo

    Ames Laboratory, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy

  • Yun Wu

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

  • Lin-Lin Wang

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

  • Kyungchan Lee

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

  • Brinda Kuthanazhi

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

  • Benjamin Schrunk

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

  • Sergey L. Bud'ko

    Ames Laboratory, Iowa State University, Dept. of Physics and Astronomy, Ames, Ames Laboratory, Iowa State University, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy

  • Paul C Canfield

    Iowa State University, Ames Laboratory and Iowa State University, Ames Lab, Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA, Ames laboratory, Ames, IA, Ames Laboratory, Iowa State University, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Iowa State University and Ames Laboratory, Iowa State University, Ames Laboratory, Department of Physics and Astronomy, Iowa State University, Division of Materials Sciences & Engineering, Ames Lab and Iowa State University, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy, Iowa State University/Ames Laboratory

  • Adam Kaminski

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