Visualization of simultaneous hybridization and magnetic exchange in the semimetal CeSb

ORAL

Abstract

Understanding the many-body physics that leads to coexisting quantum ground states is at the center of some of the deepest problems in condensed matter physics, from high-temperature superconductivity to quantum magnetism. The so-called heavy fermion compounds are an archetype of such correlated phenomena, manifesting signatures of both magnetically ordered and many-body entangled states. The compound CeSb, as a semimetal, is an unusual example where such states not only coexist but are coincident, and understanding the mechanism behinds this has eluded a complete theory for decades. Using on-resonance angle-resolved photoemission spectroscopy, we are able to highlight Ce f-bands and provide a direct visualization of how they interact with delocalized electrons and holes in the system. We find there are two distinct modes of interaction, whose action is allowed to occur simultaneously due to their separation in momentum space. This study illustrates a simple but rare example of material how the quantum mechanical independence of momentum space allows distinct many-body phenomena to coexist.

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Presenters

  • Sooyoung Jang

    Physics, UC Berkeley, UC Berkeley, Materials Science, Lawrence Berkeley National Lab

Authors

  • Sooyoung Jang

    Physics, UC Berkeley, UC Berkeley, Materials Science, Lawrence Berkeley National Lab

  • Robert Kealhofer

    University of California Berkeley, Physics, UC Berkeley

  • Ji Hoon Shim

    Chemistry , POSTECH, Pohang Univ of Sci & Tech, Department of Chemistry, Pohang University of Science and Technology, POSTECH

  • Qimiao Si

    Department of Physics and Astronomy, Rice University, Physics and Astronomy, Rice Univ, Physics and Astronomy, Rice University, Rice Univ, Rice Universiry, Physics, Rice University, Rice University, Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice University, Physics and Astronomy, and Rice Center for Quantum Materials, Rice University, Department of Physics and Astronomy, Rice Univ

  • Onur Erten

    Max Planck Institute for Physics of Complex Materials, Physics of Complex Systems, Max Planck Institute

  • Jonathan Denlinger

    Advanced Light Source, Lawrence Berkeley National Laboratory, Lawrence Berkeley Natl Lab, Lawrence Berkeley National Laboratory

  • James Analytis

    University of California Berkeley, Physics, UC Berkeley, Physics, University of California, Berkeley, Univ of California - Berkeley, University of California, Berkeley, Physics, Univ of California - Berkeley, Physics, University of California Berkeley