Design and discovery of CaKRu<sub>4</sub>P<sub>4</sub>: a new member of the generalized 1144 structure.

ORAL

Abstract

AeAFe4As4 (Ae=Ca, Sr; A=K, Rb, Cs) compounds were discovered as a new structural type [1] which has alternate stacking of the Ae and A layers. The AeAFe4As4 structure is stabilized by the combination of large Δc (= cA122-cAe122) and small Δa (= aA122-aAe122), where a and c are lattice parameters of the AFe2As2 and AeFe2As2 parent structures. In this presentation we extent this idea to similar, phosphorus-based 122 compounds with large Δc and small Δa values, identifying CaKRu4P4 as a promising candidate. The stability of a CaK1144 type ruthenium phosphide was also recently predicted by combining first principle calculations [2]. We synthesize polycrystalline CaKRu4P4 by solid state reaction of CaRu2P2 and KRu2P2. The crystallographic structure and physical properties of CaKRu4P4 will be presented.
[1], Akira Iyo, et al., J. Am. Chem. Soc. 138, 3410 (2016)
[2], Song Boqun, et al., APS March Meeting (2019)

*This work is supported by the US DOE, Basic Energy Sciences, Materials Science and Engineering Division under contract No.DE-AC02-07CH11358.

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Presenters

  • Mingyu Xu

    • Iowa State University
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames Laboratory, Iowa State University, Dept. of Physics and Astronomy, Ames
    • Ames Laboratory, Iowa State University

Authors

  • Mingyu Xu

    • Iowa State University
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames Laboratory, Iowa State University, Dept. of Physics and Astronomy, Ames
    • Ames Laboratory, Iowa State University

  • Palasyuk Andriy

    • ames Lab

  • Sergey L. Bud'ko

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

  • Boqun Song

    • Iowa State University

  • Kai-Ming Ho

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

  • 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