2007/02/01 by Eros Mariani, Leonid I. Glazman, Alex Kamenev +1 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.76.165402
published as Phys. Rev. B 76, 165402 (2007) · 4 pages, 3 figures
arxiv created 2007/02/01 · arxiv updated 2010/08/12
In the vicinity of the Fermi energy, the band structure of graphene is well described by a Dirac equation. Impurities will generally induce both a scalar potential as well as a (fictitious) gauge field acting on the Dirac fermions. We show that the angular dependence of the zero-bias anomaly in the spatially resolved tunneling density of states (TDOS) around a particular impurity allows one to distinguish between these two contributions. Our predictions can be tested in scanning-tunneling-microscopy measurements on graphene.