<i>Ab initio</i> theory and calculations of many-body effects in photoemission from semiconductor surfaces: Cs3Sb as a case study

ORAL

Abstract

Understanding the momentum distribution of photoemitted electrons is important for developing next-generation photoinjectors for electron microscopes and particle accelerators, where the photoelectron beams are required to be highly focused. We will describe a recently developed ab initio theory to predict the momentum distribution of photoelectrons as a function of photon energy, including many-body effects as needed. We then present our most recent results for Cs3Sb, which predict the (100) surface to provide highly focused photoelectron beams.

*This work is supported by the U.S. National Science Foundation under Award PHY-1549132, the Center for Bright Beams.

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Presenters

  • Johannes Kevin Nangoi

    • Physics, Cornell University

Authors

  • Johannes Kevin Nangoi

    • Physics, Cornell University

  • Alice Galdi

    • Physics, Cornell University

  • Luca Cultrera

    • Physics, Cornell University

  • Ravishankar Sundararaman

    • Materials Science and Engineering, Rensselaer Polytechnic Institute
    • Rensselaer Polytechnic Institute
    • Department of Materials Science and Engineering, Rensselaer Polytechnic Institute

  • Jared M. Maxson

    • Physics, Cornell University

  • Ivan V. Bazarov

    • Physics, Cornell University

  • Siddharth Karkare

    • Physics, Arizona State University

  • Howard A Padmore

    • Lawrence Berkeley National Laboratory

  • Tomas Arias

    • Cornell University
    • Physics, Cornell University