Non-classical electron field emission from carbon materials

摘要

The experimental current-voltage dependencies of vacuum diode with CVD film nano-carbon cold cathode have been analyzed by using classical Fowler-Nordheim approach in combination with statistical consideration for distribution of geometrical characteristics of emission sites. The adequate qualitative description of the current-voltage dependencies has been obtained. However, the numerical estimations performed for the emission sites geometrical characteristics lead to significant contradictions with basic assumptions of the classical theory. The possible non-metallic and non-classical nature of the nano-carbon emitters is discussed.