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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)

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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