Itinerate states in rare-earth hexaborides observed via resonant inelastic x-ray scattering

ORAL

Abstract

We present X-ray resonant inelastic x-ray scattering (RIXS) data collected at the L edges of divalent hexaborides YbB6 and EuB6. At an incident energy corresponding to the divalent resonance, we observe strong RIXS signal which appears to be well-described by the unoccupied 5d density of states calculated from density functional theory. In addition, we observe a second set of RIXS excitations at higher incident energy which does not correspond to any observable feature in absorption. This anomalous scattering persists to low incident energy and therefore induces excited states which are relevant to material behavior. The two classes of excitation show distinct polarizationdependence and we propose a process which describes the origin of this RIXS intensity. Our results suggest far-reaching utility of L-edge RIXS in characterizing itinerant states of f-filling materials at a microscopic level.

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Presenters

  • Donal Sheets

    University of Connecticut

Authors

  • Donal Sheets

    University of Connecticut

  • Jian-Xin Zhu

    Theoretical Division, Los Alamos National Laboratory, Los Alamos National Laboratory, Theoretical Division and Center for Integrated Nanotechnologies, Los Alamos National Laboratory, T4-PHYS OF CONDENSED MATTER & COMPLEX SYS, Los Alamos National Laboratory, Los aAlamos, USA, CINT, Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos National Laboratory,

  • Maxim Dzero

    Kent State University, Kent State

  • Diego M Casa

    Advanced Photon Source, Argonne National Laboratory, USA, Argonne National Lab, Argonne National Laboratory, Advanced Photon Source, Argonne National Laboratory

  • Jungho Kim

    Advanced Photon Source, Argonne National Laboratory, USA, Argonne National Lab, Advanced Photon Source, Argonne National Laboratory

  • Priscila Rosa

    Los Alamos National Laboratory, MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA, Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

  • Zachary Fisk

    University of California - Irvine, Department of Physics and Astronomy, University of California Irvine, University of California, Irvine, UC Irvine, Department of Physics and Astronomy, University of California- Irvine, Department of Physics and Astronomy, University of California - Irvine, Physics and Astronomy, University of California, Irvine

  • Ignace Jarrige

    Brookhaven National Lab

  • Jason Hancock

    University of Connecticut