Fermi surface and kink structures in [Formula: see text] revealed by synchrotron-based ARPES.

ABSTRACT: The low-energy electronic structure, including the Fermi surface topology, of the itinerant metamagnet [Formula: see text] is investigated for the first time by synchrotron-based angle-resolved photoemission. Well-defined quasiparticle band dispersions with matrix element dependencies on photon energy or photon polarization are presented. Four bands crossing the Fermi-level, giving rise to four Fermi surface sheets are resolved; and their complete topography, effective mass as well as their electron and hole character are determined. These data reveal the presence of kink structures in the near-Fermi-level band dispersion, with energies ranging from 30 to 69 meV. Together with previously reported Raman spectroscopy and lattice dynamic calculation studies, the data suggest that these kinks

SUBMITTER: Ngabonziza P 

PROVIDER: S-EPMC7712785 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature