Identifying Electronic Doorway States in the Secondary Electron Emission from Layered Materials
Mesoscale and Nanoscale Physics
2025-10-21 v3 Materials Science
Strongly Correlated Electrons
Abstract
We investigate the secondary low-energy electron emission induced by inelastic electron scattering from graphene and layered materials thereof. By applying a coincidence detection of the primary scattered and the emitted secondary electron we unravel pronounced resonance features otherwise overshadowed by the largely structureless secondary electron energy distribution. Supported by density functional theory calculations we show that these structures are the signature of prominent Feshbach resonances above the vacuum threshold which originate from interlayer states acting as a doorway state for electron emission. Remarkably, some of these doorway states open up only for samples with more than five layers.
Keywords
Cite
@article{arxiv.2501.06228,
title = {Identifying Electronic Doorway States in the Secondary Electron Emission from Layered Materials},
author = {Anna Niggas and Maosheng Hao and Peter Richter and Florian Simperl and Felix Blödorn and Melvin Cap and Johannes Kero and David Hofmann and Alessandra Bellissimo and Joachim Burgdörfer and Thomas Seyller and Richard A Wilhelm and Florian Libisch and Wolfgang S M Werner},
journal= {arXiv preprint arXiv:2501.06228},
year = {2025}
}