Journal
PHYSICAL REVIEW LETTERS
Volume 103, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.196803
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Funding
- US-Israel BSF
- Minerva foundation
- Microsoft Station Q
- NSF [DMR-05-29399]
- Harvard Society
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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 s(z) conserving toy models, we show that a system is a fractional topological insulator if and only if sigma(sH)/e(*) is odd, where sigma(sH) is the spin-Hall conductance in units of e/2 pi, and e(*) is the elementary charge in units of e.
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