Topological Delocalization of Two-Dimensional Massless Dirac Fermions
Topological Delocalization of Two-Dimensional Massless Dirac Fermions
The beta function of a two-dimensional massless Dirac Hamiltonian subject to a random scalar potential, which, e.g., underlies theoretical descriptions of graphene, is computed numerically. Although it belongs to, from a symmetry standpoint, the two-dimensional symplectic class, the beta function monotonically increases with decreasing conductance. We also provide an argument …