Correlated topological insulators and the fractional magnetoelectric effect

Topological insulators are characterized by the presence of gapless surface modes protected by time-reversal symmetry. In three space dimensions the magnetoelectric response is described in terms of a bulk θ [theta] term for the electromagnetic field. Here we construct theoretical examples of such p...

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Bibliographic Details
Main Authors: Swingle, Brian Gordon, Barkeshli, Maissam, McGreevy, John, Senthil, Todadri
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: American Physical Society 2011
Online Access:http://hdl.handle.net/1721.1/65354
https://orcid.org/0000-0003-4203-4148