2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/123385Due to Klein tunneling, electrostatic potentials are unable to confine Dirac electrons. We show that it is possible to confine massless Dirac fermions in a monolayer graphene sheet by inhomogeneous magnetic fields. This allows one to design mesoscopic structures in graphene by magnetic barriers, e.g. quantum dots or quantum point contacts.4 pages, 3 figures, version to appear in PRLMesoscale and Nanoscale Physicstext