Fractional topological insulators

Michael Levin, Ady Stern

Research output: Contribution to journalArticlepeer-review

233 Scopus citations


We analyze generalizations of two-dimensional topological insulators which can be realized in interacting, time reversal invariant electron systems. These states, which we call fractional topological insulators, contain excitations with fractional charge and statistics in addition to protected edge modes. In the case of sz conserving toy models, we show that a system is a fractional topological insulator if and only if σsH/e* is odd, where σsH is the spin-Hall conductance in units of e/2π, and e* is the elementary charge in units of e.

Original languageEnglish
Article number196803
JournalPhysical Review Letters
Issue number19
StatePublished - 4 Nov 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (all)


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