The persistence of the intermediate valence in SmB<sub>6</sub> under pressure

 · Invited

Abstract

We measured resonant x-ray emission spectroscopy (RXES) on SmB6 to determine the pressure dependence of the Sm f-electron occupancy. Although pressure reduces the f-occupancy, the material does not become trivalent even at the highest measured pressures of 35 GPa. Indeed, ovver the entire pressure range, Sm maintains a remarkably stable intermediate valence. This result implies that the pressure-driven closure of the hybridization/energy gap and onset of magnetic order do not require the stabilization of an integer valent state. I will discuss the implications of our results in regard to nontrivial band structure.

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Presenters

  • Nicholas Butch

    • NIST Center for Neutron Research, National Institute of Standards and Technology
    • NIST Center for Neutron Research
    • NIST- Natl Inst of Stds & Tech
    • Center for Neutron Research, NIST -Natl Inst of Stds & Tech
    • NIST -Natl Inst of Stds & Tech
    • NIST center for neutron research
    • NIST

Authors

  • Nicholas Butch

    • NIST Center for Neutron Research, National Institute of Standards and Technology
    • NIST Center for Neutron Research
    • NIST- Natl Inst of Stds & Tech
    • Center for Neutron Research, NIST -Natl Inst of Stds & Tech
    • NIST -Natl Inst of Stds & Tech
    • NIST center for neutron research
    • NIST

  • Johnpierre Paglione

    • Center for Nanophysics and Advanced Materials , University of Maryland
    • CNAM, Department of Physics, University of Maryland
    • Univ of Maryland-College Park
    • Department of Physics, University of Maryland
    • CNAM, Department of Physics, Univ of Maryland-College Park
    • Univ of Maryland - College Park
    • College Park, MD 20742-4111, Univ of Maryland-College Park
    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland
    • Center for Nanophysics and Advanced Materials, University of Maryland
    • University of Maryland, College Park
    • University of Maryland

  • Paul Chow

    • HPCAT, Carnegie Institute of Washington, Argonne National Lab
    • HPCAT

  • Yuming Xiao

    • HPCAT, Carnegie Institute of Washington, Argonne National Lab
    • HPCAT

  • Chris Marianetti

    • Columbia University
    • Physics, Columbia Univ
    • Department of Applied Physics and Applied Mathematics, Columbia university
    • Columbia Univ
    • Columbia

  • Corwin Booth

    • LBNL

  • Jason Jeffries

    • Lawrence Livermore National Lab
    • Condensed Matter and Materials Division, Lawrence Livermore National Laboratory
    • LLNL