TY - JOUR
T1 - Frustration on a centered pyrochlore lattice in metal-organic frameworks
AU - Nutakki, Rajah P.
AU - Röß-Ohlenroth, Richard
AU - Volkmer, Dirk
AU - Jesche, Anton
AU - Von Nidda, Hans Albrecht Krug
AU - Tsirlin, Alexander A.
AU - Gegenwart, Philipp
AU - Pollet, Lode
AU - Jaubert, Ludovic D.C.
N1 - Publisher Copyright:
© 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
PY - 2023/4/1
Y1 - 2023/4/1
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85158887908
U2 - 10.1103/PhysRevResearch.5.L022018
DO - 10.1103/PhysRevResearch.5.L022018
M3 - Article
AN - SCOPUS:85158887908
SN - 2643-1564
VL - 5
JO - Physical Review Research
JF - Physical Review Research
IS - 2
M1 - L022018
ER -