Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid

• Autor(a) principal: Niggas, Anna
• Data de Publicação: 2021
• Outros Autores: Creutzburg, Sascha, Schwestka, Janine, Wöckinger, Benjamin, Gupta, Tushar, Grande, Pedro Luis, Eder, Dominik, Marques, José Pires, Bayer, Bernhard C., Aumayr, Friedrich, Bennett, R., Wilhelm, Richard Arthur
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/236784
• topic: Grafite; Polarizabilidade; Íons

Over seventy years ago, Niels Bohr described how the charge state of an atomic ion moving through a solid changes dynamically as a result of electron capture and loss processes, eventually resulting in an equilibrium charge state. Although obvious, this process has so far eluded direct experimental observation. By peeling a solid, such as graphite, layer by layer, and studying the transmission of highly charged ions through single-, bi- and trilayer graphene, we can now observe dynamical changes in ion charge states with monolayer precision. In addition we present a first-principles approach based on the virtual photon model for interparticle energy transfer to corroborate our findings. Our model that uses a Gaussian shaped dynamic polarisability rather than a spatial delta function is a major step in providing a self-consistent description for interparticle de-excitation processes at the limit of small separations.