Atmospheric Physics Building,Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU
Professor Roderich Moessner, Max Planck Institute for the Physics of Complex Systems
Abstract
Topological condensed matter exhibits properties which can be unusually robust to local perturbations. Indeed, this property may make local information very hard to access, a phenomenon that may be called topological censorship. Here, we present two instances where this tension between local and topological physics brings up interesting physical phenomena. One is drawn from quantum Hall physics, where we show that the local distribution of the topologically quantised current flow is continuously tunable between qualitatively different regimes [1]. The other is a topological magnet, in which measurements of the global magnetisation dynamics reveal the appearance of a dynamical fractal and subdiffusion on the lattice scale in a stoichiometric material [2].
[1] B. Doucot, D. Kovrizhin, R. M., PNAS 121 (39) e2410703121 (2024)
[2] J. N. Hallen, S. A. Grigera, D. A. Tennant, C. Castelnovo, R.M. Science 378, 1218 (2022)
As part of the Lamb Lecture series. Professor Moessner is also giving a public lecture and a second technical lecture, Professor Moessner will be giving two technical lectures: