Statistics of Fractionalized Excitations through Threshold Spectroscopy

Morampudi, Siddhardh C.; Turner, Ari M.; Pollmann, Frank; Wilczek, Frank

doi:10.1103/PhysRevLett.118.227201

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Statistics of Fractionalized Excitations through Threshold Spectroscopy

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Morampudi, Siddhardh C.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Pollmann, Frank
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.227201
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Citation

Morampudi, S. C., Turner, A. M., Pollmann, F., & Wilczek, F. (2017). Statistics of Fractionalized Excitations through Threshold Spectroscopy. Physical Review Letters, 118(22): 227201. doi:10.1103/PhysRevLett.118.227201.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-CD05-A

Abstract

We show that neutral anyonic excitations have a signature in spectroscopic measurements of materials: The low-energy onset of spectral functions near the threshold follows universal power laws with an exponent that depends only on the statistics of the anyons. This provides a route, using experimental techniques such as neutron scattering and tunneling spectroscopy, for detecting anyonic statistics in topologically ordered states such as gapped quantum spin liquids and hypothesized fractional Chern insulators. Our calculations also explain some recent theoretical results in spin systems.