Author, as appears in the article.: Mohammed MSG; Colazzo L; Robles R; Dorel R; Echavarren AM; Lorente N; de Oteyza DG
Department: Química Analítica i Química Orgànica
URV's Author/s: ECHAVARREN PABLOS, ANTONIO
Keywords: On-surface synthesis Heptacene Graphene nanoribbons Charge-transfer Barrier Acenes
Abstract: © 2020, The Author(s). On-surface synthesis is becoming an increasingly popular approach to obtain new organic materials. In this context, metallic surfaces are the most commonly used substrates. However, their hybridization with the adsorbates often hinder a proper characterization of the molecule’s intrinsic electronic and magnetic properties. Here we report a route to electronically decouple molecules from their supporting substrates. In particular, we have used a Ag(001) substrate and hydrogenated heptacene molecules, in which the longest conjugated segment determining its frontier molecular orbitals amounts to five consecutive rings. The non-planarity that sp3 atoms impose on the carbon backbone results in electronically decoupled molecules, as demonstrated by scanning tunneling spectroscopy measurements. The charging resonances of the latter imply the presence of double tunneling barriers. We further explain the existing relation between the charging resonance energy and their contrast, as well as with the presence or absence of additional Kondo resonances.
Thematic Areas: Physics, multidisciplinary Physics and astronomy (miscellaneous) Physics and astronomy (all) General physics and astronomy Ciencias sociales
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: antoniomaria.echavarren@urv.cat
Author identifier: 0000-0002-6418-7930
Record's date: 2023-05-13
Papper version: info:eu-repo/semantics/publishedVersion
Papper original source: Communications Physics. 3 (1):
APA: Mohammed MSG; Colazzo L; Robles R; Dorel R; Echavarren AM; Lorente N; de Oteyza DG (2020). Electronic decoupling of polyacenes from the underlying metal substrate by sp 3 carbon atoms. Communications Physics, 3(1), -. DOI: 10.1038/s42005-020-00425-y
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Entity: Universitat Rovira i Virgili
Journal publication year: 2020
Publication Type: Journal Publications
Repositori URV