  The static and dynamic roughenings of a growing crystalline facet is studied
where the growth mechanism is controlled by a restricted-curvature (RC)
geometry. A continuum equation, in analogy with the Kardar-Parisi-Zhang (KPZ)
equation is considered for the purpose. It is shown here that although the
growth process begins with a RC geometry, a structural phase transition occurs
from the restricted-curvature phase to the KPZ phase. An estimation of the
corresponding critical temperature is given here. Calculations on the static
phase transition give results along the same line as existing predictions,
apart fromm minor numerical adjustments.
