Distinguishing Intrinsic from Extrinsic Effects in Time-resolved Photoemission

ORAL

Abstract

Time- and angle-resolved photoemission is a powerful tool for the study of electron dynamics in condensed matter. Ultrafast excitation results in changes of binding energies and line shapes but not all effects are intrinsic or report on the physics inside the sample. We discuss how apparent binding energy shifts due to surface photovoltage can be distinguished from shifts and broadening due to pump-induced vacuum space charge. We will share strategies to mitigate pump-induced space charge.

*This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division.

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Presenters

  • Patrick S Kirchmann

    • Geballe Laboratory for Advanced Materials, Stanford University, USA
    • SLAC - Natl Accelerator Lab

Authors

  • Patrick S Kirchmann

    • Geballe Laboratory for Advanced Materials, Stanford University, USA
    • SLAC - Natl Accelerator Lab

  • Heike Pfau

    • The Pennsylvania State University

  • Jonathan A Sobota

    • Stanford University
    • Geballe Laboratory for Advanced Materials, Stanford University, USA
    • SLAC National Accelerator Lab

  • Hadas Soifer

    • School of Physics and Astronomy, Tel Aviv University, Israel

  • Nicolas Gauthier

    • Physique & Institut Quantique, Université de Sherbrooke, Québec, Canada

  • Kejun Xu

    • Stanford University
    • Geballe Laboratory for Advanced Materials, Stanford University, USA

  • Shujie Tang

    • Geballe Laboratory for Advanced Materials, Stanford University, USA

  • Costel R Rotundu

    • Stanford University
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, USA
    • SLAC - Natl Accelerator Lab
    • SLAC National Accelerator Lab
    • Stanford

  • Zhixun Shen

    • Stanford University
    • Geballe Laboratory for Advanced Materials, Stanford University, USA
    • Stanford Univ