Photoemission footprints of extrinsic plasmarons

TL;DR

This paper predicts a method to distinguish extrinsic plasmarons from intrinsic ones using photoemission, supported by computational analysis of a specific surface system showing characteristic decay in photo-electron yield.

Contribution

It introduces a novel experimental approach to identify extrinsic plasmarons based on their photoemission signatures, validated through computational modeling.

Findings

Photoemission yield decays as inverse square root of photon energy for extrinsic plasmarons.

Computational analysis of p(2x2)-K/Graphite confirms the decay prediction.

Provides a practical method to differentiate plasmaron types in surface systems.

Abstract

A prediction how to experimentally distinguish excitations of extrinsic plasmarons from intrinsic plasmarons is presented. In surface systems where excitations of acoustic surface plasmons is possible it is shown that the photo-electron yield in normal photoemission should decay according to an inverse square root dependence with respect to the photon energy. A computational analysis of the system p(2x2)-K/Graphite confirms this prediction.