Electronic structure of detwinned BaFe2As2 from photoemission and first principles

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We performed angle-resolved photoelectron spectroscopy (ARPES) studies on mechanically detwinned BaFe2As2. We observe clear band dispersions, and the shapes and characters of the Fermi surfaces are identified. Shapes of two-hole pockets around the Gamma point are found to be consistent with the Fermi surface topology predicted in the orbital ordered states. Dirac-cone-like band dispersions near the Gamma point are clearly identified as theoretically predicted. At the X point, split bands remain intactdespite detwinning, barring a twinning origin of the bands. Observed band dispersions are compared with calculated band structures. With a magnetic moment of 0.2 mu(B) per iron atom, there is good agreement between the calculation and the experiment.
Publisher
AMERICAN PHYSICAL SOC
Issue Date
2011-02
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW B, v.83, no.6

ISSN
1098-0121
DOI
10.1103/PhysRevB.83.064509
URI
http://hdl.handle.net/10203/212611
Appears in Collection
NT-Journal Papers(저널논문)
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