# Unconventional integer quantum Hall effect in graphene.

@article{Gusynin2005UnconventionalIQ, title={Unconventional integer quantum Hall effect in graphene.}, author={V. P. Gusynin and S. G. Sharapov}, journal={Physical review letters}, year={2005}, volume={95 14}, pages={ 146801 } }

Monolayer graphite films, or graphene, have quasiparticle excitations that can be described by (2+1)-dimensional Dirac theory. We demonstrate that this produces an unconventional form of the quantized Hall conductivity sigma(xy) = -(2e2/h)(2n+1) with n = 0, 1, ..., which notably distinguishes graphene from other materials where the integer quantum Hall effect was observed. This unconventional quantization is caused by the quantum anomaly of the n=0 Landau level and was discovered in recent…

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