Superconductivity up to 35 K in the Iron Platinum Arsenides (CaFe1−xPtxAs)10Pt4−yAs8 with Layered Structures

Authors

  • Catrin Löhnert,

    1. Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5–13 (Haus D), 81377 München (Germany)
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  • Tobias Stürzer,

    1. Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5–13 (Haus D), 81377 München (Germany)
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  • Dr. Marcus Tegel,

    1. Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5–13 (Haus D), 81377 München (Germany)
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  • Rainer Frankovsky,

    1. Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5–13 (Haus D), 81377 München (Germany)
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  • Gina Friederichs,

    1. Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5–13 (Haus D), 81377 München (Germany)
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  • Prof. Dr. Dirk Johrendt

    Corresponding author
    1. Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5–13 (Haus D), 81377 München (Germany)
    • Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5–13 (Haus D), 81377 München (Germany)
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  • This work was financially supported by the German Research Foundation (DFG) within the priority program SPP1458, project JO257/6-1.

Abstract

original image

The family of iron arsenide superconductors is expanded by the new iron platinum compounds (CaFe1−xPtxAs10)Pt4−yAs8 with novel crystal structures. Layers of FeAs4/4 tetrahedra and of nearly planar PtAs4/2 squares with (As2)4− dumbbells are stacked in different ways, resulting in polytypes with triclinic or tetragonal symmetry. Superconductivity up to 35 K is induced either by Pt doping of the Fe site or by electron transfer from PtAs to FeAs layers.

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