Schottky effect
Schottky effect
A phenomenon where the potential barrier decreases when a strong electric field is applied to a substance. The Schottky-type electron gun emits sufficient electrons with the aid of a strong electric field at a lower temperature (～1800 K) than the temperature that can effectively emit thermoelectrons. In the actual Schottky-type electron gun, the surface of the tungsten (W) tip is covered with a thin layer of zirconium oxide (ZrO) to further decrease the potential barrier.
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