Quarter-filled honeycomb lattice with a quantized Hall conductance
Quarter-filled honeycomb lattice with a quantized Hall conductance
We study a generic two-dimensional hopping model on a honeycomb lattice with strong spin-orbit coupling, without the requirement that the half-filled lattice be a Topological Insulator. For quarter-(or three-quarter) filling, we show that a state with a quantized Hall conductance generically arises in the presence of a Zeeman field of …