Probing many-body scattering in Cu(111) via FT-STS: Understanding local perturbations from the collective signatures of a 2D electron gas

ORAL

Abstract

Surface states of close-packed noble metals provide one of the simplest scenarios for studying many-body scattering in two dimensions, turning them into a relatively simple platform to test novel spectroscopic techniques. In this talk I will present a study of the Cu(111) surface state with high-resolution Fourier Transform Scanning Tunnelling Spectroscopy (FT-STS), and for the first time demonstrate that the QPI lineshape can be quantitatively fit using many-body effects within the T-matrix formalism. Specifically, the self-energies and the scattering phase-shifts are quantified for both the occupied and unoccupied states, further expanding the capabilities of FT-STS beyond its conventional application as merely a probe of the energy dispersion in scattering space.

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Presenters

  • Gelareh Farahi

    Physics, Princeton University

Authors

  • Gelareh Farahi

    Physics, Princeton University

  • Steven Johnston

    Univ. of Tennessee, Univ of Tennessee, Physics, Univ of Tennessee, Knoxville, Physics and Astronomy, University of Tennessee, Department of Physics and Astronomy, University of Tennessee, Physics, Univ. of Tennessee, physics and astronomy, University of Tennessee, Department of Physics and Astronomy, Univ of Tennessee, Knoxville

  • Sarah Burke

    Physics and Astronomy, University of British Columbia

  • Doug Bonn

    University of British Columbia, Physics and Astronomy, University of British Columbia, Department of Physics and Astronomy, University of British Columbia