In metallic-like field emission, from metallic or semiconducting surfaces,
most of the emitted electrons have energies within a narrow range from the
Fermi level downwards, originating from a continuous (in energy) density of
states at the surface of the emitter. In the present paper we introduce a
generalized Fowler-Nordheim formula to describe metallic-like emission. (C)
2001 Elsevier Science Ltd. All rights reserved.