Symmetric-gapped surface states of fractional topological insulators

Gil Young Cho, Jeffrey C.Y. Teo, Eduardo Fradkin

Research output: Contribution to journalArticlepeer-review


We construct the symmetric-gapped surface states of a fractional topological insulator with an electromagnetic θ angle θem=π3 and a discrete Z3 gauge field. They are the proper generalizations of the T-Pfaffian state and Pfaffian/antisemion state and feature an extended periodicity compared with their "integer" topological band insulator counterparts. We demonstrate that the surface states have the correct anomalies associated with time-reversal symmetry and charge conservation.

Original languageEnglish (US)
Article number161109
JournalPhysical Review B
Issue number16
StatePublished - Oct 12 2017

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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