تقرير
On-surface synthesis and collective spin excitations of a triangulene-based nanostar
| العنوان: | On-surface synthesis and collective spin excitations of a triangulene-based nanostar |
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| المؤلفون: | Hieulle, Jeremy, Castro, Silvia, Friedrich, Niklas, Vegliante, Alessio, Lara, Francisco Romero, Sanz, Sofía, Rey, Dulce, Corso, Martina, Frederiksen, Thomas, Pascual, Jose Ignacio, Peña, Diego |
| المصدر: | Angew. Chem. Int. Ed. 60, 25224-25229 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Chemical Physics |
| الوصف: | Triangulene nanographenes are open-shell molecules with predicted high spin state due to the frustration of their conjugated network. Their long-sought synthesis became recently possible over a metal surface. Here, we present a macrocycle formed by six [3]triangulenes, which was obtained by combining the solution synthesis of a dimethylphenyl-anthracene cyclic hexamer and the on-surface cyclodehydrogenation of this precursor over a gold substrate. The resulting triangulene nanostar exhibits a collective spin state generated by the interaction of its 12 unpaired {\pi}-electrons along the conjugated lattice, corresponding to the antiferromagnetic ordering of six S = 1 sites (one per triangulene unit). Inelastic electron tunneling spectroscopy resolved three spin excitations connecting the singlet ground state with triplet states. The nanostar behaves close to predictions from the Heisenberg model of a S = 1 spin ring, representing a unique system to test collective spin modes in cyclic systems. Comment: 8 pages Ms with 3 figures; 12 pages Supplementary Information |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1002/anie.202108301 |
| URL الوصول: | http://arxiv.org/abs/2107.02198 |
| رقم الأكسشن: | edsarx.2107.02198 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1002/anie.202108301 |
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