Interaction Driven Quantum Phase Transitions in Fractional Topological Insulators

Details Interaction Driven Quantum Phase Transitions in Fractional Topological Insulators Interaction Driven Quantum Phase Transitions in Fractional Topological Insulators

2011-12-20

arxiv.org/abs/1112.4872v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

We study two species of (or spin-1/2) fermions with short-range intra-species repulsion in the presence of opposite (effective) magnetic field, each at Landau level filling factor 1/3. In the absence of inter-species interaction, the ground state is simply two copies of the 1/3 Laughlin state, with opposite chirality, representing the fractional topological insulator (FTI) phase. We show this phase is stable against moderate inter-species interactions. However strong enough inter-species repulsion leads to phase separation, while strong enough inter-species attraction drives the system into a superfluid phase. We obtain the phase diagram through exact diagonalization calculations. The FTI-superfluid phase transition is shown to be in the (2+1)D XY universality class, using an appropriate Chern-Simons-Ginsburg-Landau effective field theory.

Affiliated with

Also associated with

No associations

Rating

Interaction Driven Quantum Phase Transitions in Fractional Topological Insulators does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Interaction Driven Quantum Phase Transitions in Fractional Topological Insulators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interaction Driven Quantum Phase Transitions in Fractional Topological Insulators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-189117