Particle-hole symmetric localization in two dimensions

  title={Particle-hole symmetric localization in two dimensions},
  author={Olexei I. Motrunich and Kedar Damle and David A. Huse},
  journal={Physical Review B},
We revisit two-dimensional particle-hole symmetric sublattice localization problem, focusing on the origin of the observed singularities in the density of states ρ(E) at the band center E=0. The most general system of this kind [R. Gade, Nucl. Phys. B 398, 499 (1993)] exhibits critical behavior and has ρ(E) that diverges stronger than any integrable power law, while the special random vector potential model of Ludwig et al. [Phys. Rev. B 50, 7526 (1994)] has instead a power-law density of… 
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