Dirac electron in gapped graphene under exponentially decaying magnetic field

Abstract

In this work, we present a Dirac electron in gapped graphene under the exponentially decaying magnetic field. Solving Dirac-Weyl equations, we obtain exact expressions of the eigenfunctions and their corresponding eigenvalues. The probability density and current distributions are also investigated in detail. The results are compared to those in the gapless graphene as well as in the gapped graphene in the presence of a uniform magnetic field.