2019/02/26 by Matthew D. Watson, Watson, Matthew D., Pavel Dudin +17
Engineering · Materials Science · Physics and Astronomy · #Advanced Materials Characterization Techniques #FOS: Physical sciences #Iron-based superconductors research #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.1902.10266
openalex publication_date 2019/02/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We revisit the electronic structure of BaFe2As2, the archetypal parent\ncompound of the Fe-based superconductors, using angle-resolved photoemission\nspectroscopy (ARPES). Our high-resolution measurements of samples detwinned by\nthe application of a mechanical strain reveal a highly anisotropic 3D Fermi\nsurface in the low temperature magnetic phase. By comparison of the observed\ndispersions with ab-initio calculations, we argue that overall it is magnetism,\nrather than orbital ordering, which is the dominant effect, reconstructing the\nelectronic structure across the Fe 3d bandwidth. Finally, we measure band\ndispersions directly from within one domain without applying strain to the\nsample, by using the sub-micron focused beam spot of a nano-ARPES instrument.\n