Identifying Electronic Doorway States in Secondary Electron Emission from Layered Materials
Year: 2025
Type: article
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 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.
Source: Physical Review Letters
DOI: 10.1103/qls7-tr4v
Institutions: TU Wien, Chemnitz University of Technology
Language: English
Subfield: Surfaces, Coatings and Films
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Awards: G1440718505, G163165086, G3004690861, G3401503105, TU-DX: Towards Applications of 2D Materials, G434337789, Time-Resolved Electron Spectroscopy of a Challenging Highly Innovative Collective Excitation Study, G6743195226, European Spectroscopy Laboratory to model the materials of the future, G7568163532
OpenAlex ID: W4415221603