Frustration on a centered pyrochlore lattice in metal-organic frameworks
| Autor: | Rajah P. Nutakki, Richard Röß-Ohlenroth, Dirk Volkmer, Anton Jesche, Hans-Albrecht Krug von Nidda, Alexander A. Tsirlin, Philipp Gegenwart, Lode Pollet, Ludovic D. C. Jaubert |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Physical Review Research, Vol 5, Iss 2, p L022018 (2023) |
| Druh dokumentu: | article |
| ISSN: | 2643-1564 39140148 |
| DOI: | 10.1103/PhysRevResearch.5.L022018 |
| Popis: | 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 centered 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. |
| Databáze: | Directory of Open Access Journals |
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