Frustration on a centered pyrochlore lattice in metal-organic frameworks

  • 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.

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Metadaten
Author:Rajah P. Nutakki, Richard Röß-OhlenrothORCiD, Dirk VolkmerORCiDGND, Anton JescheORCiDGND, Hans-Albrecht Krug von NiddaORCiDGND, Alexander A. TsirlinORCiDGND, Philipp GegenwartGND, Lode Pollet, Ludovic D. C. Jaubert
URN:urn:nbn:de:bvb:384-opus4-1050947
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/105094
ISSN:2643-1564OPAC
Parent Title (English):Physical Review Research
Publisher:American Physical Society (APS)
Place of publication:College Park, MD
Type:Article
Language:English
Year of first Publication:2023
Publishing Institution:Universität Augsburg
Release Date:2023/06/22
Tag:General Physics and Astronomy
Volume:5
Issue:2
First Page:L022018
DOI:https://doi.org/10.1103/physrevresearch.5.l022018
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Festkörperchemie
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik V
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik VI
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):CC-BY 4.0: Creative Commons: Namensnennung (mit Print on Demand)