Skyrmions and Hall viscosity
arXiv:1712.05032 · doi:10.1063/1.5006957
Abstract
We discuss the contribution of magnetic Skyrmions to the Hall viscosity and propose a simple way to identify it in experiments. The topological Skyrmion charge density has a distinct signature in the electric Hall conductivity that is identified in existing experimental data. In an electrically neutral system, the Skyrmion charge density is directly related to the thermal Hall conductivity. These results are direct consequences of the field theory Ward identities, which relate various physical quantities based on symmetries and have been previously applied to quantum Hall systems.
arXiv comment10 pages, based on the invited talk at the 62nd Annual Conference on Magnetism and Magnetic Materials (MMM conference), November 6-10, Pittsburgh, PA
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