126311 20241125101153.0 doi 10.1039/d2sc06407c sideral 133630 ART-2023-133630 eng Burzurí, Enrique A quantum spin liquid candidate isolated in a two-dimensional Co^IIRh^III bimetallic oxalate network 2023 Access copy available to the general public Unrestricted 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. info:eu-repo/grantAgreement/ES/CSIC/PTI-001 info:eu-repo/grantAgreement/ES/DGA/E09-17R-Q-MAD info:eu-repo/grantAgreement/EC/H2020/ 788222/EU/Molecule-induced control over 2D Materials/Mol-2D This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 788222-Mol-2D info:eu-repo/grantAgreement/EC/H2020/862893/EU/Molecular spin qudits offering new hope for quantum computing/FATMOLS This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 862893-FATMOLS info:eu-repo/grantAgreement/ES/MDM/CEX2018-000805-M info:eu-repo/grantAgreement/ES/MICINN/CEX2019-000919-M info:eu-repo/grantAgreement/ES/MICINN/CEX2019-000925-S info:eu-repo/grantAgreement/ES/MICINN/PID2020-118117RB-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2021-124734OB-C21 info:eu-repo/grantAgreement/ES/MICINN/PID2021-124796OB-I00 info:eu-repo/grantAgreement/ES/MICINN/RTI2018-096075-A-C22 info:eu-repo/grantAgreement/ES/MICINN/RTI2018-096075-B-C21 info:eu-repo/grantAgreement/ES/MICINN/RYC2019-028429-I info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 7.6 2023 CHEMISTRY, MULTIDISCIPLINARY 40 / 231 = 0.173 2023 Q1 T1 2.333 2023 Chemistry (miscellaneous) 2023 Q1 14.4 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Martínez-Pérez, María José (orcid)0000-0002-8125-877X Martí-Gastaldo, Carlos Evangelisti, Marco (orcid)0000-0002-8028-9064 Mañas-Valero, Samuel Coronado, Eugenio Martínez, Jesús I. Universidad de Zaragoza (orcid)0000-0002-5406-3280 Galán-Mascaros, José Ramón Luis, Fernando (orcid)0000-0001-6284-0521 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 14 (2023), 3899-3906 Chem. sci. CHEMICAL SCIENCE 2041-6520 1018956 http://zaguan.unizar.es/record/126311/files/texto_completo.pdf Versión publicada 2972742 http://zaguan.unizar.es/record/126311/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:126311 articulos driver 2024-11-22-12:07:45 ARTICLE