Comparative study of resonant and sequential features in electron field emission from composite surfaces

Coulomb blockade and quantum confinement in field electron emission from heterostructured nanotips

“…Let us finally discuss the possible mechanisms of electron tunneling in the considered structures, namely coherent and sequential tunneling processes, which, in general, both contribute to the transport through double-barrier structures [21]. The dominant mechanism depends on the coupling between the reservoir and the emitting nanostructure [22,23]. The coupling strength can be characterized by the tunneling resistance, RT.…”

“…3). However, the discrepancies in the shape and amplitudes of the differential conductance peaks may indicate an additional contribution of coherent tunneling [23,24].…”