Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 87: Low-dimensional systems: Topological order 2 (TT with DS/HL/MA/O)

HL 87.5: Talk

Thursday, March 19, 2015, 16:00–16:15, H 3010

Diagnosing the statistics of excitations from the dynamical structure factor — •Siddhardh Morampudi¹, Ari Turner², and Frank Pollmann¹ — ¹Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany — ²Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland

We show that the statistics of excitations in quantum spin liquids yield characteristic features in the dynamical structure factor. Quantum spin liquids are exotic phases of matter which fall beyond the traditional paradigm of symmetry breaking. Originally proposed by Anderson with regard to high temperature superconductivity, they are now widely believed to arise in frustrated spin systems such as the antiferromagnetic Heisenberg model on the kagome lattice. Recently, various theoretical methods to characterize spin liquids have been introduced, especially with regard to numerical simulations. In this work, we obtain results connecting the statistics of the excitations to features of the dynamical structure factor which can be obtained from neutron scattering. We furthermore demonstrate how the results can be used to distinguish different types of gapped spin liquids.