Designer Spin Models in Tunable Two-Dimensional Nanographene Lattices
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Título: | Designer Spin Models in Tunable Two-Dimensional Nanographene Lattices |
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Autor/es: | Henriques, João C.G. | Ferri-Cortés, Mar | Fernández-Rossier, Joaquín |
Grupo/s de investigación o GITE: | Grupo de Nanofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Nanographenes | Star lattice | Valence bond crystal | Triplons |
Fecha de publicación: | 1-mar-2024 |
Editor: | American Chemical Society |
Cita bibliográfica: | Nano Letters. 2024, 24(11): 3355-3360. https://doi.org/10.1021/acs.nanolett.3c04915 |
Resumen: | Motivated by recent experimental breakthroughs, we propose a strategy for designing two-dimensional spin–lattices with competing interactions that lead to nontrivial emergent quantum states. We consider S = 1/2 nanographenes with C3 symmetry as building blocks, and we leverage the potential to control both the sign and the strength of exchange with first neighbors to build a family of spin models. Specifically, we consider the case of a Heisenberg model in a triangle-decorated honeycomb lattice with competing ferromagnetic and antiferromagnetic interactions whose ratio can be varied in a wide range. On the basis of the exact diagonalization of both Fermionic and spin models, we predict a quantum phase transition between a valence bond crystal of spin singlets with triplon excitations living in a Kagomé lattice and a Néel phase of effective S = 3/2 in the limit of dominant ferromagnetic interactions. |
Patrocinador/es: | M.F.-C. acknowledges funding from Generalitat Valenciana (CIACIF/2021/434). J.F.-R. and J.H. acknowledge financial support from FCT (Grant PTDC/FIS-MAC/2045/2021), SNF Sinergia (Grant Pimag, CRSII5-205987), and the European Union (Grant FUNLAYERS-101079184). J.F.-R. acknowledges funding from Generalitat Valenciana (Prometeo2021/017 and MFA/2022/045) and MICIN-Spain (Grants PID2019-109539GB-C41 and PRTR-C1y.I1). |
URI: | http://hdl.handle.net/10045/141210 |
ISSN: | 1530-6984 (Print) | 1530-6992 (Online) |
DOI: | 10.1021/acs.nanolett.3c04915 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2024 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY 4.0. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1021/acs.nanolett.3c04915 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
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Archivo | Descripción | Tamaño | Formato | |
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Henriques_etal_2024_NanoLett.pdf | 1,47 MB | Adobe PDF | Abrir Vista previa | |
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