Academic Journal
Electronic Decoupling of Polyacenes from the Underlying Metal Substrate bysp(3)Carbon Atoms
| العنوان: | Electronic Decoupling of Polyacenes from the Underlying Metal Substrate bysp(3)Carbon Atoms |
|---|---|
| المؤلفون: | Mohammed, Mohammed S. G., Colazzo, Luciano, Robles Rodríguez, Roberto, Dorel, Ruth, Echavarren, Antonio M., Lorente Palacios, Nicolás, García de Oteyza Feldermann, Dimas |
| المساهمون: | European Commission |
| بيانات النشر: | Nature |
| سنة النشر: | 2020 |
| المجموعة: | ADDI: Repositorio Institucional de la Universidad del País Vasco / Euskal Herriko Unibertsitatea (UPV/EHU - Basque Country University) |
| مصطلحات موضوعية: | on-surface synthesis, graphene nanoribbons, charge-transfer, heptacene, barrier, acenes |
| الوصف: | Many organic molecules exhibit interesting electronic and magnetic properties, but as they are deposited onto a metallic substrate, their hybridisation often impacts on the observed characteristics. Here, the authors report a method to electronically decouple molecules from the substrate in order to observe the intrinsic physical properties of molecules without interference. 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 thatsp(3)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 ; This project has received funding from the European Union's Horizon 2020 research and innovation program under Grant Agreement Nos. 635919 (ERC-StG), 837225 (ERC-PoC), and 766864 (FET-Open), from the Spanish Agencia Estatal de Investigacion (Grant Nos. MAT2016-78293-C6, PID2019-104815GB-I00 and PID2019-107338RBC63), from AGAUR (2017 SGR 1257), and from the CERCA,Program/Generalitat de Catalunya. We thank Alex Riss for interesting discussions. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | info:eu-repo/grantAgreement/EC/H2020/635919; info:eu-repo/grantAgreement/EC/H2020/837225; info:eu-repo/grantAgreement/EC/H2020/766864; info:eu-repo/grantAgreement/MICINN/MAT2016-78293-C6; info:eu-repo/grantAgreement/MICINN/PID2019-104815GB-I00; info:eu-repo/grantAgreement/MICINN/PID2019-107338RB-C63; https://www-nature-com.ehu.idm.oclc.org/articles/s42005-020-00425-y; Communications Physics 3(1) : (2020) // Article ID 159; http://hdl.handle.net/10810/50342 |
| DOI: | 10.1038/s42005-020-00425-y |
| الاتاحة: | http://hdl.handle.net/10810/50342 https://doi.org/10.1038/s42005-020-00425-y |
| Rights: | info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/3.0/es/ ; This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) ; Atribución 3.0 España |
| رقم الانضمام: | edsbas.708E7347 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1038/s42005-020-00425-y |
|---|