On-surface Synthesis of a Ferromagnetic Molecular Spin Trimer
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866909816035737600 |
|---|---|
| author | Vegliante, Alessio Vilas-Varela, Manuel Ortiz, Ricardo Lara, Francisco Romero Kumar, Manish Gómez-Rodrigo, Lucía Trivini, Stefano Schulz, Fabian Soler, Diego Ahmoum, Hassan Artacho, Emilio Frederiksen, Thomas Jelínek, Pavel Pascual, Jose Ignacio Peña, Diego |
| author_facet | Vegliante, Alessio Vilas-Varela, Manuel Ortiz, Ricardo Lara, Francisco Romero Kumar, Manish Gómez-Rodrigo, Lucía Trivini, Stefano Schulz, Fabian Soler, Diego Ahmoum, Hassan Artacho, Emilio Frederiksen, Thomas Jelínek, Pavel Pascual, Jose Ignacio Peña, Diego |
| contents | Triangulenes are prototypical examples of open-shell nanographenes. Their magnetic properties, arising from the presence of unpaired $π$ electrons, can be extensively tuned by modifying their size and shape or by introducing heteroatoms. Different triangulene derivatives have been designed and synthesized in recent years, thanks to the development of on-surface synthesis strategies. Triangulene-based nanostructures with polyradical character, hosting several interacting spin units, can be challenging to fabricate but are particularly interesting for potential applications in carbon-based spintronics. Here, we combine pristine and N-doped triangulenes into a more complex nanographene, \textbf{TTAT}, predicted to possess three unpaired $π$ electrons delocalized along the zigzag periphery. We generate the molecule on an Au(111) surface and detect direct fingerprints of multi-radical coupling and high-spin state using scanning tunneling microscopy and spectroscopy. With the support of theoretical calculations, we show that its three radical units are localized at distinct parts of the molecule and couple via symmetric ferromagnetic interactions, which result in a $S=3/2$ ground state, thus demonstrating the realization of a molecular ferromagnetic Heisenberg-like spin trimer |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_09587 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On-surface Synthesis of a Ferromagnetic Molecular Spin Trimer Vegliante, Alessio Vilas-Varela, Manuel Ortiz, Ricardo Lara, Francisco Romero Kumar, Manish Gómez-Rodrigo, Lucía Trivini, Stefano Schulz, Fabian Soler, Diego Ahmoum, Hassan Artacho, Emilio Frederiksen, Thomas Jelínek, Pavel Pascual, Jose Ignacio Peña, Diego Mesoscale and Nanoscale Physics Materials Science Triangulenes are prototypical examples of open-shell nanographenes. Their magnetic properties, arising from the presence of unpaired $π$ electrons, can be extensively tuned by modifying their size and shape or by introducing heteroatoms. Different triangulene derivatives have been designed and synthesized in recent years, thanks to the development of on-surface synthesis strategies. Triangulene-based nanostructures with polyradical character, hosting several interacting spin units, can be challenging to fabricate but are particularly interesting for potential applications in carbon-based spintronics. Here, we combine pristine and N-doped triangulenes into a more complex nanographene, \textbf{TTAT}, predicted to possess three unpaired $π$ electrons delocalized along the zigzag periphery. We generate the molecule on an Au(111) surface and detect direct fingerprints of multi-radical coupling and high-spin state using scanning tunneling microscopy and spectroscopy. With the support of theoretical calculations, we show that its three radical units are localized at distinct parts of the molecule and couple via symmetric ferromagnetic interactions, which result in a $S=3/2$ ground state, thus demonstrating the realization of a molecular ferromagnetic Heisenberg-like spin trimer |
| title | On-surface Synthesis of a Ferromagnetic Molecular Spin Trimer |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2505.09587 |