Kondo Effect in a Neutral and Stable All Organic Radical Single Molecule Break Junction
Autor: | Rocco Gaudenzi, Herre S. J. van der Zant, Marta Mas-Torrent, Isaac Alcón, Jaume Veciana, Carlos Franco, Enrique Burzurí, Stefan T. Bromley, Concepció Rovira, Riccardo Frisenda |
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Přispěvatelé: | Universitat de Barcelona |
Rok vydání: | 2015 |
Předmět: |
Single molecule
Radical Single Kondo effect Bioengineering 02 engineering and technology 010402 general chemistry Transport d'electrons 7. Clean energy 01 natural sciences Kondo Paramagnetism junction electrical transport General Materials Science Physics::Chemical Physics Hyperfine structure Electrical organic radical molecule radical Magnetisme Organic Condensed matter physics Spintronics Chemistry effect Solid state electronics Mechanical Engineering Electron transport Magnetism General Chemistry Espintrònica 021001 nanoscience & nanotechnology Condensed Matter Physics 3. Good health 0104 chemical sciences Unpaired electron Break Chemical physics transport break junction magnetism 0210 nano-technology Ground state Break junction Electrònica de l'estat sòlid |
Zdroj: | Dipòsit Digital de la UB Universidad de Barcelona Recercat. Dipósit de la Recerca de Catalunya instname Digital.CSIC. Repositorio Institucional del CSIC |
Popis: | Organic radicals are neutral, purely organic molecules exhibiting an intrinsic magnetic moment due to the presence of an unpaired electron in the molecule in its ground state. This property, added to the low spin–orbit coupling and weak hyperfine interactions, make neutral organic radicals good candidates for molecular spintronics insofar as the radical character is stable in solid state electronic devices. Here we show that the paramagnetism of the polychlorotriphenylmethyl radical molecule in the form of a Kondo anomaly is preserved in two- and three-terminal solid-state devices, regardless of mechanical and electrostatic changes. Indeed, our results demonstrate that the Kondo anomaly is robust under electrodes displacement and changes of the electrostatic environment, pointing to a localized orbital in the radical as the source of magnetism. Strong support to this picture is provided by density functional calculations and measurements of the corresponding nonradical species. These results pave the way toward the use of all-organic neutral radical molecules in spintronics devices and open the door to further investigations into Kondo physics. This work was supported by the EU FP7 program through project 618082 ACMOL and ERC grants advanced (Mols@Mols) and StG 2012-306826 e-GAMES. It was also supported by the Dutch Organization for Fundamental research (FOM), OCW, NWO(VENI), the Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) DGI (Spain) with projects BE-WELL CTQ2013-40480-R and MAT2012-30924, and Generalitat de Catalunya 14 (2014-SGR-17),(2014SGR97) and XRQTC. C.F. acknowledges CSIC for his PhD bursary and he is enrolled in the Materials Science PhD program of UAB |
Databáze: | OpenAIRE |
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