Hole Doping and Antiferromagnetic Correlations above the Néel Temperature of Topological Semimetal SrMnSb<sub>2</sub>

ORAL

Abstract

Neutron diffraction and magnetic susceptibility studies of orthorhombic single crystal SrMnSb2 and hole doped Sr0.97K0.03MnSb2 confirm the three dimensional antiferromagnetic (AFM) ordering of the Mn2+ moments at TN = 297(3) K for SrMnSb2 and TN = 305(3) K for the hole doped compound. Neutron scattering show strong quasi two-dimensional AFM correlations that persist to almost twice TN. In conjuction with susceptibility measurements, this observation seems to rule out a recently suggested ferromagnetic phase above TN in SrMnSb2. We also report detailed analysis of de-Haas van-Alphen oscilations observed on the parent and doped compounds.

*This research was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering. Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No.~DE-AC02-07CH11358.

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Presenters

  • David Vaknin

    • Ames Laboratory, Iowa State University
    • Ames Laboratory

Authors

  • Yong Liu

    • Ames Laboratory, Iowa State University

  • Farhan Islam

    • Ames Laboratory, Iowa State University

  • Wei Tian

    • Oak Ridge National Laboratory

  • Thomas Heitmann

    • University of Missouri
    • University of Missouri Research Reactor, University of Missouri
    • The Missouri Research Reactor, University of Missouri

  • Benjamin Ueland

    • Ames Laboratory, Iowa State University
    • Ames Laboratory/Iowa State University

  • Andreas Kreyssig

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

  • Alan Ira Goldman

    • Ames Laboratory, Iowa State University
    • Ames Laboratory/Iowa State University

  • Robert J. McQueeney

    • Ames Laboratory, Iowa State University

  • David Vaknin

    • Ames Laboratory, Iowa State University
    • Ames Laboratory