Evidence for non-metallic behaviour in tetragonal FeS (mackinawite)

S. J. Denholme, S. Demura, H. Okazaki, H. Hara, K. Deguchi, M. Fujioka, T. Ozaki, T. Yamaguchi, H. Takeya, Y. Takano

    Research output: Contribution to journalArticlepeer-review

    22 Citations (Scopus)

    Abstract

    We report conductivity measurements for mackinawite at atmospheric pressure and up to values of 1.64 GPa. As far as the authors are aware, this is the first low temperature transport measurements to be conducted on mackinawite. The sample shows semiconducting-like behaviour up to the maximum pressures applied but with a gradual flattening of the resistivity curve it is tentatively suggested that the system will undergo a semiconductor-metallic transition with a further application of pressure. Interestingly, this contradicts band structure and more recent density functional theory (DFT) calculations which predict a metallic system. However, the experimental data agrees with the original prediction of semiconducting behaviour made by Bertaut 1965. This research also shows that, at least in its parent form, mackinawite does not exhibit a superconductive state unlike its iso-structural counterpart tetragonal FeSe. This is also briefly discussed.

    Original languageEnglish
    Pages (from-to)50-56
    Number of pages7
    JournalMaterials Chemistry and Physics
    Volume147
    Issue number1-2
    DOIs
    Publication statusPublished - 2014 Sep 15

    Keywords

    • Band structure
    • Chalcogenides
    • Semiconductivity
    • Superconductivity

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics

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