تقرير
Highly-Entangled Polyradical Nanographene with Coexisting Strong Correlation and Topological Frustration
| العنوان: | Highly-Entangled Polyradical Nanographene with Coexisting Strong Correlation and Topological Frustration |
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| المؤلفون: | Song, Shaotang, Solé, Andrés Pinar, Matěj, Adam, Li, Guangwu, Stetsovych, Oleksandr, Soler, Diego, Yang, Huimin, Telychko, Mykola, Li, Jing, Kumar, Manish, Brabec, Jiri, Veis, Libor, Wu, Jishan, Jelinek, Pavel, Lu, Jiong |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Physics - Chemical Physics |
| الوصف: | Open-shell benzenoid polycyclic aromatic hydrocarbons, known as magnetic nanographenes, exhibit unconventional p-magnetism arising from topological frustration or strong electronic-electron (e-e) interaction. Imprinting multiple strongly entangled spins into polyradical nanographenes creates a major paradigm shift in realizing non-trivial collective quantum behaviors and exotic quantum phases in organic quantum materials. However, conventional design approaches are limited by a single magnetic origin, which can restrict the number of correlated spins or the type of magnetic ordering in open-shell nanographenes. Here, we present a novel design strategy combing topological frustration and e-e interactions to fabricate the largest fully-fused open-shell nanographene reported to date, a 'butterfly'-shaped tetraradical on Au(111). We employed bond-resolved scanning tunneling microscopy and spin excitation spectroscopy to unambiguously resolve the molecular backbone and reveal the strongly correlated open-shell character, respectively. This nanographene contains four unpaired electrons with both ferromagnetic and anti-ferromagnetic interactions, harboring a many-body singlet ground state and strong multi-spin entanglement, which can be well described by many-body calculations. Furthermore, we demonstrate that the nickelocene magnetic probe can sense highly-correlated spin states in nanographene. The ability to imprint and characterize many-body strongly correlated spins in polyradical nanographenes not only presents exciting opportunities for realizing non-trivial quantum magnetism and phases in organic materials but also paves the way toward high-density ultrafast spintronic devices and quantum information technologies. Comment: 17 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2304.01641 |
| رقم الأكسشن: | edsarx.2304.01641 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |