title: Correlation effects in two-dimensional topological insulators.
abstract: Topological insulators have become one of the most active research areas in condensed matter physics. This article reviews progress on the topic of electronic correlation effects in the two-dimensional case, with a focus on systems with intrinsic spin-orbit coupling and numerical results. Topics addressed include an introduction to the noninteracting case, an overview of theoretical models, correlated topological band insulators, interaction-driven phase transitions, topological Mott insulators and fractional topological states, correlation effects on helical edge states, and topological invariants of interacting systems.
authors.affiliation: Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany. mhohenadler@physik.uni-wuerzburg.de
authors.forename: M
authors.initials: M
authors.lastname: Hohenadler
authors.forename: F F
authors.initials: FF
authors.lastname: Assaad