Tuning between a fractional topological insulator and competing phases at $\hat{I}{½}_{\mathrm{T}}=2/3$

Roger Brunner, Titus Neupert, Glenn Wagner

We study a spinful, time-reversal symmetric lowest Landau level model for a flatband quantum spin Hall system at total filling fraction $\hat{I}{½}_{\mathrm{T}}=2/3$. Such models are relevan…