We present a theory of momentum-space local density of states (LDOS) maps $N\left(\mathit{q},\omega \right)$ in graphene. The LDOS map has both intravalley contributions centered near zero momentum and reciprocal-lattice vectors and intervalley contributions displaced by the wave vector ${\mathit{K}}^{\prime }\text{−}\mathit{K}$ which connects graphene’s two distinct Dirac points. Using graphene’s Dirac equation chiral quasiparticle continuum model, we obtain analytic results which explain the qualitative differences between these two LDOS-map features. We comment on the sensitivity of both $N\left(\mathit{q},\omega \right)$ features to the mix of atomic length scale and smooth disorder sources present in a particular graphene sample.

• Received 7 March 2008

DOI:https://doi.org/10.1103/PhysRevB.78.014201