Noncoplanar and chiral spin states on the way towards Néel ordering in fullerene Heisenberg models - Fermions Fortement Corrélés
Article Dans Une Revue Physical Review B Année : 2024

Noncoplanar and chiral spin states on the way towards Néel ordering in fullerene Heisenberg models

Résumé

Using a high-accuracy variational Monte Carlo approach based on group-convolutional neural networks, we obtain the symmetry-resolved low-energy spectrum of the spin-1/2 Heisenberg model on several highly symmetric fullerene geometries, including the famous C60 buckminsterfullerene. We argue that as the degree of frustration is lowered in large fullerenes, they display characteristic features of incipient magnetic ordering: Correlation functions show high-intensity Bragg peaks consistent with Néel-like ordering, while the low-energy spectrum is organized into a tower of states. Competition with frustration, however, turns the simple Néel order into a noncoplanar one. Remarkably, we find and predict chiral incipient ordering in a large number of fullerene structures.
Fichier principal
Vignette du fichier
Szabo_2024.pdf (1.85 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04566181 , version 1 (03-09-2024)

Licence

Identifiants

Citer

Attila Szabo, Sylvain Capponi, Fabien Alet. Noncoplanar and chiral spin states on the way towards Néel ordering in fullerene Heisenberg models. Physical Review B, 2024, 109 (5), pp.054410. ⟨10.1103/PhysRevB.109.054410⟩. ⟨hal-04566181⟩
33 Consultations
2 Téléchargements

Altmetric

Partager

More