Many-Body Description of STM-Induced Fluorescence of Charged Molecules

A scanning tunneling microscope is used to study the fluorescence of a model charged molecule (quinacridone) adsorbed on a sodium chloride (NaCl)-covered metallic sample. Fluorescence from the neutral and positively charged species is reported and imaged using hyperresolved fluorescence microscopy....

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Bibliographic Details
Published inPhysical review letters Vol. 130; no. 12; p. 126202
Main Authors Jiang, Song, Neuman, Tomáš, Bretel, Rémi, Boeglin, Alex, Scheurer, Fabrice, Le Moal, Eric, Schull, Guillaume
Format Journal Article
LanguageEnglish
Published United States 24.03.2023
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Summary:A scanning tunneling microscope is used to study the fluorescence of a model charged molecule (quinacridone) adsorbed on a sodium chloride (NaCl)-covered metallic sample. Fluorescence from the neutral and positively charged species is reported and imaged using hyperresolved fluorescence microscopy. A many-body model is established based on a detailed analysis of voltage, current, and spatial dependences of the fluorescence and electron transport features. This model reveals that quinacridone adopts a palette of charge states, transient or not, depending on the voltage used and the nature of the underlying substrate. This model has a universal character and clarifies the transport and fluorescence mechanisms of molecules adsorbed on thin insulators.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.130.126202