Publication
Physical Review B
Paper

Theoretical study of focused field emission of electrons from a point source

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Abstract

We clarify basic mechanisms for focused field emission of electrons from a point source. The effective potential barrier arising from the lateral confinement of current carrying states is shown to be essential for subband filtering. A hornlike opening at the emission plane further improves the collimation even if the transport is not adiabatic. We predict novel source- and field-dependent resonance effects which can affect the emission characteristics. © 1990 The American Physical Society.

Date

15 Nov 1990

Publication

Physical Review B

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