University of Cambridge > Talks.cam > Theory of Condensed Matter > The nature of the quantum spin-liquid state in Herbertsmithite

The nature of the quantum spin-liquid state in Herbertsmithite

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Dr G Moller.

Recent neutron scattering experiments on the layered spin-1/2 kagome lattice antiferromagnet Herbertsmithite revealed the first signature of fractionalized excitations in a quantum spin liquid state. The precise nature of this state remains unclear, however. Indeed, mean-field models of gapped as well as gapless spin liquids exhibit sharp features in the dynamic structure factor, none of which have been observed in experiment. In this talk I’m going to show that several of the experimentally observed details can be explained by the presence of topological vortex excitations in a gapped Z2 spin liquid. These so called vison excitations form almost flat bands on the kagome lattice and act as a momentum sink for the spin-carrying excitations probed by neutron scattering.

This talk is part of the Theory of Condensed Matter series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2024 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity