Frustration on a centered pyrochlore lattice in metal-organic frameworks
JAUBERT, L.D.C.
Centre National de la Recherche Scientifique [CNRS]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
< Leer menos
Centre National de la Recherche Scientifique [CNRS]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Idioma
en
Article de revue
Este ítem está publicado en
Physical Review Research. 2023-05-01, vol. 5, p. L022018
American Physical Society
Resumen en inglés
Geometric frustration inhibits magnetic systems from ordering, opening a window to unconventional phases of matter. The paradigmatic frustrated lattice in three dimensions to host a spin liquid is the pyrochlore, although ...Leer más >
Geometric frustration inhibits magnetic systems from ordering, opening a window to unconventional phases of matter. The paradigmatic frustrated lattice in three dimensions to host a spin liquid is the pyrochlore, although there remain few experimental compounds thought to realize such a state. Here we go beyond the pyrochlore via molecular design in the metal-azolate framework [Mn(II)(ta)2], which realizes a closely related centred pyrochlore lattice of Mn-spins with S=5/2. Despite a Curie-Weiss temperature of −21 K indicating the energy scale of magnetic interactions, [Mn(II)(ta)2] orders at only 430 mK, putting it firmly in the category of highly frustrated magnets. Comparing magnetization and specific heat measurements to numerical results for a minimal Heisenberg model, we predict that this material displays distinct features of a classical spin liquid with a structure factor reflecting Coulomb physics in the presence of charges.< Leer menos
Proyecto europeo
FP7/ERC Consolidator Grant QSIMCORR, No. 771891
Proyecto ANR
Design de la frustration: effets de surface et désordre - ANR-18-CE30-0011
Orígen
Importado de HalCentros de investigación