NUTAKKI, Rajah; JAUBERT, Ludovic; POLLET, Lode

doi:10.21468/SciPostPhys.15.2.040

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NUTAKKI, Rajah
Munich Center for Quantum Science and Technology [MCQST]
Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM]

JAUBERT, Ludovic
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

POLLET, Lode
Munich Center for Quantum Science and Technology [MCQST]
Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM]

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Article de revue

Ce document a été publié dans

SciPost Physics. 2023-08-01, vol. 15, p. 40

SciPost Foundation

Résumé en anglais

The centred pyrochlore lattice is a novel geometrically frustrated lattice, realized in the metal-organic framework Mn(ta) 2 [1] where the basic unit of spins is a five site centred tetrahedron. Here, we present an in-depth theoretical study of the J 1 − J 2 classical Heisenberg model on this lattice, using a combination of mean-field analytical methods and Monte Carlo simulations. We find a rich phase diagram with low temperature states exhibiting ferrimagnetic order, partial ordering, and a highly degenerate spin liquid with distinct regimes of low temperature correlations. We discuss in detail how the regime displaying broadened pinch points in its spin structure factor is consistent with an effective description in terms of a fluid of interacting charges. We also show how this picture holds in two dimensions on the analogous centred kagome lattice and elucidate the connection to the physics of thin films in (d + 1) dimensions. Furthermore, we show that a Coulomb phase can be stabilized on the centred pyrochlore lattice by the addition of further neighbour couplings. This demonstrates the centred pyrochlore lattice is an experimentally relevant geometry which naturally hosts emergent gauge fields in the presence of charges at low energies. Contents< Réduire

DOI

http://dx.doi.org/10.21468/SciPostPhys.15.2.040

Project ANR

Design de la frustration: effets de surface et désordre - ANR-18-CE30-0011

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798