Fractional (Chern and topological) insulators. (25th August 2015)

• Record Type: Journal Article
• Authors: Neupert, Titus; Chamon, Claudio; Iadecola, Thomas; Santos, Luiz H; Mudry, Christopher
• Is Part Of: Physica scripta. Volume T164(2015:Dec.)
• Publication Date: 2015-08-25
• Subjects: topological order -- fractional topological insulators -- fractional Chern insulators; Physics -- Periodicals; 530.05
• DOI: 10.1088/0031-8949/2015/T164/014005
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: We review various features of interacting Abelian topological phases of matter in two spatial dimensions, placing particular emphasis on fractional Chern insulators (FCIs) and fractional topological insulators (FTIs). We highlight aspects of these systems that challenge the intuition developed from quantum Hall physics—for instance, FCIs are stable in the limit where the interaction energy scale is much larger than the band gap, and FTIs can possess fractionalized excitations in the bulk despite the absence of gapless edge modes.