Abstract
A two-dimensional condensed-matter lattice model is presented which exhibits a nonzero quantization of the Hall conductance in the absence of an external magnetic field. Massless fermions without spectral doubling occur at critical values of the model parameters, and exhibit the so-called "parity anomaly" of (2+1)-dimensional field theories.
- Received 16 September 1987
DOI:https://doi.org/10.1103/PhysRevLett.61.2015
©1988 American Physical Society