Superconductivity in Ca10(Ir4As8)(Fe2As2)5 with Square-Planar Coordination of Iridium

Abstract

We report the unprecedented square-planar coordination of iridium in the iron iridium arsenide Ca10(Ir4As8)(Fe2As2)5. This material experiences superconductivity at 16 K. X-ray photoemission spectroscopy and first- principles band calculation suggest Ir(II) oxidation state, which yields electrically conductive Ir4As8 layers. Such metallic spacer layers are thought to enhance the interlayer coupling of Fe2As2, in which superconductivity emerges, thus offering a way to control the superconducting transition temperature.

17 pages, 5 figures, 2 tables

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Cited by in corpus (10)

• Exploration of new superconductors and functional materials and fabrication of superconducting tapes and wires of iron pnictides
• Superconducting Transition Temperatures of up to 47 K from Simultaneous Rare-Earth Element and Antimony Doping of 112-Type CaFeAs2
• Enhanced Superconductivity up to 43 K by P/Sb Doping of Ca1-xLaxFeAs2
• Superconductivity by rare earth doping in the 1038-type compounds (Ca${}_{1-x}$RE${}_x$)${}_{10}$(FeAs)${}_{10}$(Pt${}_3$As${}_8$) with RE = Y, La-Nd, Sm-Lu
• Lattice distortion and stripe-like antiferromagnetic order in Ca10(Pt3As8)(Fe2As2)5
• Various arsenic network structures in 112-type Ca1-xLaxFe1-yPdyAs2 revealed by synchrotron x-ray diffraction experiments
• Synchrotron X-ray Diffraction Study of Structural Phase Transition in Ca10(Ir4As8)(Fe2-xIrxAs2)
• Coexistence of Bloch electrons and glassy electrons in Ca10(Ir4As8)(Fe2_xIrxAs2)5 revealed by angle-resolved photoemission spectroscopy
• Superconductivity by transition metal doping in Ca${}_{10}$(Fe${}_{1-x}$M${}_x$As)${}_{10}$(Pt${}_3$As${}_8$) (M = Co, Ni, Cu)
• Suppression of superconductivity and structural phase transition against pressure in Ca${}_{10}$(Ir${}_4$As${}_8$)(Fe${}_{2-x}$Ir${}_x$As${}_2$)${}_5$