2010/11/04 by Y. K. Kim, Hyungju Oh, Kim, Y. K. +29
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #Surface and Thin Film Phenomena #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1011.1112
Accepted for publication in Physical Review B
openalex publication_date 2010/11/04 · arxiv created 2011/01/11 · arxiv updated 2011/01/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 the 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 the X-point, split bands remain intact in spite of detwinning, barring twinning origin of the bands. The observed band dispersions are compared with calculated band structures. With a magnetic moment of 0.2 ?B per iron atom, there is a good agreement between the calculation and experiment.