Imaging the Spatial Distribution of Electronic States in Graphene Using Electron Energy-Loss Spectroscopy: Prospect of Orbital Mapping

Autor:	M. Bugnet, M. Ederer, V. K. Lazarov, L. Li, Q. M. Ramasse, S. Löffler, D. M. Kepaptsoglou
Rok vydání:	2022
Předmět:	General Physics and Astronomy
Zdroj:	Physical Review Letters. 128
ISSN:	1079-7114 0031-9007
Popis:	The spatial distributions of antibonding π^{*} and σ^{*} states in epitaxial graphene multilayers are mapped using electron energy-loss spectroscopy in a scanning transmission electron microscope. Inelastic channeling simulations validate the interpretation of the spatially resolved signals in terms of electronic orbitals, and demonstrate the crucial effect of the material thickness on the experimental capability to resolve the distribution of unoccupied states. This work illustrates the current potential of core-level electron energy-loss spectroscopy towards the direct visualization of electronic orbitals in a wide range of materials, of huge interest to better understand chemical bonding among many other properties at interfaces and defects in solids.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5aafc951e2f2f75f9795978bbd8f30f7 https://doi.org/10.1103/physrevlett.128.116401 Zobrazit plný text záznamu