FORMATION OF STEP DENSITY SHOCK WAVES ON VICINAL NaCl(100) GROWTH SURFACES
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY(2022)
Abstract
The morphology of the growth surface near NaCl(100), formed during the pore motion in a crystal due to the temperature gradient, has been studied by the electron microscopic method of vacuum decoration. It is shown that at T = 950 K and Delta mu/kT = 4 center dot 10(-3), the profile of the vicinal surface in the < 11 > direction is represented by monoatomic steps, while in the <10> direction,as the surface curvature increases, there is a grouping of steps with the formation of macrosteps - bunches of elementary steps separated by areas of atomically smooth terraces. The sawtooth dependence of the step density on the longitudinal coordinate is described by a particular solution of the Burgers equation for a shock wave. Data on the parameters of three shock waves and the time of their formation are obtained.
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Key words
shock waves
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