Integer Quantum Hall Effect on a Square Lattice with Zero Net Magnetic Field
arXiv:cond-mat/0603271
Abstract
A square lattice model which exhibits a nonzero quantized Hall conductance in a zero net magnetic field at certain values of the parameters is presented. The quantization is due to the existence of a topological winding number that characterizes the quantum Hall phases and is expected to survive the effects of weak disorder.
7 pages, 2 figures