Importance of the Fermi surface and magnetic interactions for the superconducting dome in electron-doped FeSe intercalates

Makoto Shimizu, Nayuta Takemori, Daniel Guterding, Harald O. Jeschke

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    The van-der-Waals gap of iron chalcogenide superconductors can be intercalated with a variety of inorganic and organic compounds that modify the electron doping level of the iron layers. In Lix(C3N2H10)0.37FeSe, a dome in the superconducting transition temperature Tc has been reported to occur in the doping range of x=0.06 to x=0.68. We use a combination of density functional theory and spin fluctuation theory to capture the evolution of superconducting transition temperatures theoretically. We clearly demonstrate how the changing electronic structure supports an increasing superconducting Tc. The suppression of Tc at high doping levels can, however, only be understood by analyzing the magnetic tendencies, which evolve from stripe-type at low doping to bicollinear at high doping.

    Original languageEnglish
    Article number180511
    JournalPhysical Review B
    Volume101
    Issue number18
    DOIs
    Publication statusPublished - May 1 2020

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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