Half-Integer Quantum Hall States in Two-Dimensional Graphite

Non-Abelian fractionalized quasiparticles in half-integer quantum Hall states have been proposed as a platform for the realization of topologically protected fault-tolerant qubits. We observe half-integer quantum Hall states out to remarkably large Landau level filling factors larger than 30 in dual-gated ∼3-10 nm-thick graphite devices. We identify most as single-component states stabilized by fractional correlations in exterior bilayers. Multicomponent (3,3,1) states with strong correlations between opposite-valley states on opposite sides of the graphite interior also appear. The facile integration of graphite with top and bottom surface gates makes thin film graphite an attractive platform to explore the physics of non-Abelian fractionalized quasiparticles.