Noncoplanar and chiral spin states on the way towards Néel ordering in fullerene Heisenberg models
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866911774024925184 |
|---|---|
| author | Szabó, Attila Capponi, Sylvain Alet, Fabien |
| author_facet | Szabó, Attila Capponi, Sylvain Alet, Fabien |
| contents | Using high-accuracy variational Monte Carlo based on group-convolutional neural networks (GCNNs), we obtain the symmetry-resolved low-energy spectrum of the spin-1/2 Heisenberg model on several highly symmetric fullerene geometries, including the famous C$_{60}$ 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 organised 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_01496 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Noncoplanar and chiral spin states on the way towards Néel ordering in fullerene Heisenberg models Szabó, Attila Capponi, Sylvain Alet, Fabien Strongly Correlated Electrons Computational Physics Using high-accuracy variational Monte Carlo based on group-convolutional neural networks (GCNNs), we obtain the symmetry-resolved low-energy spectrum of the spin-1/2 Heisenberg model on several highly symmetric fullerene geometries, including the famous C$_{60}$ 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 organised 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. |
| title | Noncoplanar and chiral spin states on the way towards Néel ordering in fullerene Heisenberg models |
| topic | Strongly Correlated Electrons Computational Physics |
| url | https://arxiv.org/abs/2311.01496 |