▎ 摘 要
Using the Dirac-Weyl model, we study the low-lying spectra of a massless Dirac electron bound to a positively charged Coulomb impurity in a graphene magnetic dot, for which the inhomogeneous magnetic field is created by different magnetic fields inside and outside the dot with a field ratio a. Numerical results show that the zero energy states, in the presence of the impurity, are converted into hole-like states. Additionally, for positive and negative a values, the states are, in general, located inside and outside the dot, respectively, causing the spectra to exhibit different features. (C) 2013 AIP Publishing LLC.