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Field electron emission from TiC single crystals of and directions was examined. Very stable electron emission was observed when the crystals were flashed at a certain temperature. The current fluctuations due to the residual gas were also reduced. The flashing temperatures make changes in the emission patterns, which render the shapes of the top of the field emission tip. It is concluded that the surface near the top is constracted by (100) and (111) facets independently of the crystal orientations, and this conclusion is confirmed by the Fowler-Nordheim plot of the emission current.

Flashing Temperature Dependence of Field Electron Emission from TiC Single Crystals