Electronic structure of detwinned BaFe2As2 from photoemission and first principles

Yeongkwan Kim, Hyungju Oh, Chul Kim, Dongjoon Song, Wonsig Jung, Beomyoung Kim, Hyoung Joon Choi, Changyoung Kim, Bumsung Lee, Seunghyun Khim, Hyungjoon Kim, Keehoon Kim, Jongbeom Hong, Yongseung Kwon

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Abstract

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 Γ point are found to be consistent with the Fermi surface topology predicted in the orbital ordered states. Dirac-cone-like band dispersions near the Γ point are clearly identified as theoretically predicted. At theX 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 μB per iron atom, there is good agreement between the calculation and the experiment.

Original languageEnglish
Article number064509
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number6
DOIs
Publication statusPublished - 2011 Feb 11

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Kim, Y., Oh, H., Kim, C., Song, D., Jung, W., Kim, B., Choi, H. J., Kim, C., Lee, B., Khim, S., Kim, H., Kim, K., Hong, J., & Kwon, Y. (2011). Electronic structure of detwinned BaFe2As2 from photoemission and first principles. Physical Review B - Condensed Matter and Materials Physics, 83(6), [064509]. https://doi.org/10.1103/PhysRevB.83.064509