Fermiological interpretation of FeTe1-xSex thin crystal by quantum conductance oscillation

H. Okazaki, T. Yamaguchi, T. Watanabe, K. Deguchi, S. Demura, S. J. Denholme, T. Ozaki, Y. Mizuguchi, H. Takeya, T. Oguchi, Y. Takano

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    We have successfully observed quantum oscillations in the magnetic-field dependence of resistivity in FeTe1-xSex. Quantum oscillation measurements were performed using non-superconducting and superconducting thin crystals of FeTe0.65Se0.35 cleaved from a bulk single crystal by mechanical exfoliation. We show that the Fermi surface (FS) of the non-superconducting crystals is in good agreement with the rigid band shift model based on electron doping by excess Fe, while that of the superconducting crystal is in good agreement with the calculated FS with no shift. From the comparison of the FS for both crystals, we determined the change of the cross-sectional area of the FS, suggesting that the suppression of the FS nesting with the vector due to excess Fe leads to the disappearance of superconductivity.

    Original languageEnglish
    Article number37010
    JournalEPL
    Volume104
    Issue number3
    DOIs
    Publication statusPublished - 2013 Nov

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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