Hedgehog spin-vortex crystal magnetic order in superconducting CaK(Fe<sub>1-x</sub><i>M</i><sub>x</sub>)<sub>4</sub>As<sub>4</sub> (<i>M</i>=Co, Ni)

ORAL

Abstract

Antiferromagnetism in Fe-based superconductors is characterized by a pair of propagation vectors which may support a number of magnetic phases. Ni- and Co-doping in CaKFe4As4 suppresses superconductivity and stabilizes a new antiferromagnetic phase. Thermodynamic, transport, structural and local magnetic probes reveal this phase to be consistent with the hedgehog spin-vortex crystal. Ab initio calculations also indicate a preference for this non-collinear antiferromagnetism which is stabilized by the reduced symmetry of the CaKFe4As4 structure.
W. R. Meier et al., arXiv:1706.01067 (2017).

*This work is supported by the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant GBMF4411 and the US DOE, Basic Energy Sciences under Contract No. DE-AC02-07CH11358.

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Presenters

  • William Meier

    • Iowa state university/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University/Ames Laboratory
    • Ames Laboratory and Iowa State University, Dept. of Physics and Astronomy
    • Dept. of Physics, Iowa State Univ
    • Ames Laboratory

Authors

  • William Meier

    • Iowa state university/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University/Ames Laboratory
    • Ames Laboratory and Iowa State University, Dept. of Physics and Astronomy
    • Dept. of Physics, Iowa State Univ
    • Ames Laboratory

  • Q.-P. Ding

    • Dept. of Physics, Iowa State Univ

  • Andreas Kreyssig

    • Ames Laboratory, Iowa State University
    • Dept. of Physics and Astronomy, Ames Laboratory/Iowa State University
    • Iowa State University
    • Ames Laboratory and Iowa State University, Dept. of Physics and Astronomy
    • Dept. of Physics, Iowa State Univ
    • Ames Lab

  • Sergey Bud'ko

    • The Ames Laboratory
    • Iowa state university/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University/Ames Laboratory
    • Iowa State University / Ames Laboratory
    • Ames Laboratory and Iowa State University, Dept. of Physics and Astronomy
    • Dept. of Physics, Iowa State Univ
    • Ames Lab
    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory
    • Department of Physics and Astronomy, Ames Laboratory and Iowa State University

  • Aashish Sapkota

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

  • Karunakar Kothapalli

    • Dept. of Physics, Iowa State Univ

  • Vladislav Borisov

    • Institute of Theoretical Physics, Goethe University Frankfurt
    • Inst. Theoretical Physics, Goethe Univ. Frankfurt am Main

  • Roser Valenti

    • Institute of Theoretical Physics, Goethe University Frankfurt
    • Inst. Theoretical Physics, Goethe Univ. Frankfurt am Main
    • Institut für Theoretische Physik, Goethe-Universität Frankfurt

  • Cristian Batista

    • Department of Physics and Astronomy, Univ of Tennessee, Knoxville
    • Univ of Tennessee, Knoxville
    • Department of Physics and Astronomy, The University of Tennessee
    • University of Tennessee
    • Physics, University of Tennessee
    • The University of Tennessee
    • Department of Phys., Univ. of Tennessee
    • U. Tennessee, Knoxville
    • University of Tennessee, Knoxville

  • Peter Orth

    • Dept. of Physics, Iowa State Univ

  • Rafael Fernandes

    • School of Physics and Astronomy, University of Minnesota
    • School of Physics and Astronomy , University of Minnesota
    • School of Physics and Astronomy, Univ of Minnesota - Twin Cities
    • Univ of Minn - Minneapolis
    • School of Phys., Univ. of Minnesota - Minneapolis
    • University of Minnesota

  • Alan Goldman

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

  • Yuji Furukawa

    • Dept. of Physics, Iowa State Univ
    • Department of Physics and Astronomy, Iowa State University

  • Anna Boehmer

    • Dept. of Physics and Astronomy, Ames Laboratory/Iowa State University
    • Iowa state university/Ames Laboratory
    • Institut fuer Festkoerperphysik, Karlsruhe Institute of Technology
    • Dept. of Physics, Iowa State Univ

  • Paul Canfield

    • Ames Laboratory and Iowa State University
    • Ames Laboratory, Iowa State University
    • Department of Physics and Astronomy, Iowa State University
    • Dept. of Physics and Astronomy, Ames Laboratory/Iowa State University
    • Iowa state university/Ames Laboratory
    • Ames Laboratory and Iowa State Univ
    • Iowa State University and Ames Laboratory
    • Iowa State University/Ames Laboratory
    • Iowa State University
    • Iowa State University / Ames Laboratory
    • Dept. of Physics, Iowa State Univ
    • Ames Lab
    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Iowa State Univ
    • Ames Laboratory
    • Department of Physics and Astronomy, Ames Laboratory and Iowa State University