Electron flow in circular graphene quantum dots
  We study the electron propagation in a circular electrostatically defined quantum dot in graphene. Solving the scattering problem for a plane Dirac electron wave we identify different scattering regimes depending on the radius and potential of the dot as well as the electron energy. Thereby, our particular focus lies on resonant scattering and the temporary electron trapping in the dot. 
C. Schulz, R. L. Heinisch, and H. Fehske
cond-mat.mes-hall