Study of CaK(Fe<sub>1-<i>x</i></sub><i>A<sub>x</sub></i>)<sub>4</sub>As<sub>4</sub> (<i>A </i>= Mn and Cr) single crystals

ORAL

Abstract

Stoichiometric CaKFe4As4 is a Fe-based superconductor which has a critical temperature at 35 K. Substituting Fe with Ni or Co suppresses superconductivity and stabilizes an unusual hedgehog spin-vortex crystal magnetic structure [1]. There is a range of concentrations where superconductivity and magnetism coexist [2,3,4]. Having in mind different effect of [Fe, Co] and [Mn, Cr] substitutions in BaFe2As2, we grew single crystals of CaK(Fe1-xAx)4As4 (A = Cr and Mn) and characterized them by magnetic and transport measurements. Phase diagrams of CaK(Fe1-xAx)4As4 (A = Fe, Co, Mn, Cr) will be compared and the observed trends will be discussed in the context of Fe-based superconductors.
[1] W. R. Meier, et al., npj Quant. Mat. 3, 5 (2018).
[2] S. L. Bud'ko, et al., arXiv1810.07084v1 (2018).
[3] A. Kreyssig, et al., Phys. Rev. B 97, 224521 (2018).
[4] Q.-P. Ding, et al., Phys. Rev. Lett. 121, 137204 (2018).

*We thank A. Kreyssig for insightful discussions. This work is supported by the US DOE, Basic Energy Sciences, Materials Science and Engineering Division under contract No.DE-AC02-07CH11358. W.R.M. was supported by the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant No. GBMF4411. L. X. was supported, in part, by the W. M. Keck Foundation.

–

Presenters

  • Mingyu Xu

    • Ames Laboratory, Iowa State University
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Ames Laboratory & Iowa State University
    • Iowa State University and Ames Laboratory

Authors

  • Mingyu Xu

    • Ames Laboratory, Iowa State University
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Ames Laboratory & Iowa State University
    • Iowa State University and Ames Laboratory

  • William Meier

    • Ames Laboratory and Dept. of Physics, Iowa State University
    • Ames Laboratory, Iowa State University
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Iowa State University and Ames Laboratory
    • Ames Laboratory & Department of Physics, Iowa State University

  • Li Xiang

    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory/Iowa State University
    • Physics, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory

  • Sergey Budko

    • Iowa State University
    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory, Iowa State University
    • Ames Laboratory/Iowa State University
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA
    • Ames Lab & Dept of Physics and Astronomy, Iowa State University
    • Physics, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory

  • Paul Canfield

    • Ames Laboratory and Dept. of Physics, Iowa State University
    • Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.
    • Ames Laboratory
    • Iowa State University
    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory, Iowa State University
    • Ames Laboratory/Iowa State University
    • Iowa State University and Ames Laboratory
    • Ames Laboratory and Iowa State University, Ames, IA, USA
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA
    • Ames Lab & Dept of Physics and Astronomy, Iowa State University
    • Department of Physics & Astronomy, Iowa State University
    • Department of physics and astronomy, Iowa State University/Ames Laboratory
    • Physics, Iowa State University/Ames Laboratory
    • Ames Laboratory & Iowa State University
    • Physics, Iowa State University