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A quantum spin liquid candidate isolated in a two-dimensional CoIIRhIII bimetallic oxalate network

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A quantum spin liquid candidate isolated in a two-dimensional CoIIRhIII bimetallic oxalate network

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dc.contributor.author	Burzuri Linares, Enrique
dc.contributor.author	Martínez Pérez, María Jesús
dc.contributor.author	Martí Gastaldo, Carlos
dc.contributor.author	Evangelisti Crespo, Marco
dc.contributor.author	Mañas Valero, Samuel
dc.contributor.author	Coronado Miralles, Eugenio
dc.contributor.author	Galán Mascarós, José Ramón
dc.contributor.author	Luis, Fernando
dc.date.accessioned	2023-10-20T12:59:22Z
dc.date.available	2023-10-20T12:59:22Z
dc.date.issued	2023
dc.identifier.uri	https://hdl.handle.net/10550/90513
dc.description.abstract	A quantum spin liquid (QSL) is an elusive state of matter characterized by the absence of long-range magnetic order, even at zero temperature, and by the presence of exotic quasiparticle excitations. In spite of their relevance for quantum communication, topological quantum computation and the understanding of strongly correlated systems, like high-temperature superconductors, the unequivocal experimental identification of materials behaving as QSLs remains challenging. Here, we present a novel 2D heterometallic oxalate complex formed by high-spin Co(II) ions alternating with diamagnetic Rh(III) in a honeycomb lattice. This complex meets the key requirements to become a QSL: a spin ½ ground state for Co(II), determined by spin-orbit coupling and crystal field, a magnetically-frustrated triangular lattice due to the presence of antiferromagnetic correlations, strongly suppressed direct exchange interactions and the presence of equivalent interfering superexchange paths between Co centres. A combination of electronic paramagnetic resonance, specific heat and ac magnetic susceptibility measurements in a wide range of frequencies and temperatures shows the presence of strong antiferromagnetic correlations concomitant with no signs of magnetic ordering down to 15 mK. These results show that bimetallic oxalates are appealing QSL candidates as well as versatile systems to chemically fine tune key aspects of a QSL, like magnetic frustration and superexchange path geometries.
dc.language.iso	eng
dc.relation.ispartof	Chemical Science, 2023, num. 14, p. 3899-3906
dc.source	Burzuri Linares, Enrique Martínez Pérez, María Jesús Martí Gastaldo, Carlos Evangelisti Crespo, Marco Mañas Valero, Samuel Coronado Miralles, Eugenio Galán Mascarós, José Ramón Luis, Fernando 2023 A quantum spin liquid candidate isolated in a two-dimensional CoIIRhIII bimetallic oxalate network Chemical Science 14 3899 3906
dc.subject	Química
dc.title	A quantum spin liquid candidate isolated in a two-dimensional CoIIRhIII bimetallic oxalate network
dc.type	journal article
dc.date.updated	2023-10-20T12:59:22Z
dc.identifier.doi	10.1039/D2SC06407C
dc.identifier.idgrec	160454
dc.rights.accessRights	open access