The sublimation of basal surfaces of zinc oxide

Abstract

Basal surfaces of both undoped and lithium‐doped single crystals of zinc oxide were sublimated under Langmuir free vaporization conditions and under various partial pressures of oxygen. The vaporization coefficient was lower for the (0001̄) surface than for the (0001) surface. Oxygen suppressed the sublimation rates except for the (0001) surface at high temperatures. Lithium doping produced a large increase in sublimation rates. An earlier theory of surface‐charge influenced sublimation was modified to include specific effects of surface kinks, surface roughening, and doping. The experimental results could be interpreted in terms of this modified theory.