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Complete Fermi surface in BaFe$_2$As$_2$ observed via Shubnikov-de Haas oscillation measurements on detwinned single crystals

We show that the Fermi surface (FS) in the antiferromagnetic phase of BaFe$_2$As$_2$ is composed of one hole and two electron pockets, all of which are three dimensional and closed, in sharp contrast to the FS observed by angle-resolved photoemission spectroscopy. Considerations on the carrier compensation and Sommerfeld coefficient rule out existence of unobserved FS pockets of significant sizes. A standard band structure calculation reasonably accounts for the observed FS, despite the overestimated ordered moment. The mass enhancement, the ratio of the effective mass to the band mass, is 2--3.

preprint2011arXivOpen access
Taichi TerashimaNobuyuki KuritaMegumi TomitaKunihiro KihouChul-Ho LeeYasuhide TomiokaToshimitsu ItoAkira IyoHiroshi EisakiTian LiangMasamichi NakajimaShigeyuki IshidaShin-ichi UchidaHisatomo HarimaShinya Uji
cond-mat.supr-concond-mat.str-el
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Taichi TerashimaNobuyuki KuritaMegumi TomitaKunihiro KihouChul-Ho LeeYasuhide TomiokaToshimitsu ItoAkira IyoHiroshi EisakiTian LiangMasamichi NakajimaShigeyuki IshidaShin-ichi UchidaHisatomo HarimaShinya Uji

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