Tunable critical correlations in kagome ice and the approach to the Kasteleyn transition
| When |
Apr 08, 2021
from 02:00 to 03:00 |
|---|---|
| Where | Visio conférence Zoom |
| Attendees |
Peter Holdsworth |
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Jeudi 8 Avril
Title: Tunable critical correlations in kagome ice and the approach to the Kasteleyn transition
Peter Holdsworth (Laboratoire de Physique, ENS de Lyon)
Abstract:
Phase transitions falling outside the Landau-Ginzburg-Wilson paradigm are a recurring theme of modern statistical physics. In this seminar
I will discuss one of the simplest examples - the Kasteleyn transition. This is a topological transition involving the deconfinement of
topological defects in a field with continuous symmetry. A model system showing a K-transition is kagome spin ice in an external field
for which a dual language exists between spins and hard core dimers on a hexagonal lattice. I will explain how kagome planes can be isolated
by applying a field in the [111] direction in a spin ice sample and discuss our recent neutron scattering experiments on single crystals
of holmium titanate in which the transition is approached as the field is slightly tilted into the kagome plane (https://arxiv.org/pdf/2102.06546.pdf).
I will show how the critical correlations of kagome ice are tuned, following the biaxial symmetry breaking of the field.