Averaged surface reconstruction

Figure 2. Three-dimensional representation of the averaged surface reconstructions. A and B correspond to Figure 1A and B, respectively. Dark areas are regions of lowest elevation and white areas are those of highest elevation. (Reproduced with permission from reference 19. Copyright 1991...

Next, the step-mobilityof Si(OOl) is estimated at lower temperatures, T 500°C, from the experiments of Webb et al. [25] on the relaxation kinetics of non-equilibrium step-spacings. In this experiment, the average terrace size was large, and therefore, due to the stress anisotropy of the 2 x 1 surface reconstruction, a long range interaction of the form... 

Figure 9. Phase reconstruction of image reported in Figure 6 using the reference of image reported in Figure 8. The phase map is shown in (a), which includes a laterally averaged line-scan of 15 pixels, (b) A surface map of the two particles shape is displayed. The surface plot has been heavily noise filtered through Gaussian smoothing to better display the particles shape.

We now modify the 2D continuum equations of step motion, Eqs. (7) and (8), in order to study some aspects of the dynamics of faceting. We assume the system is in the nucleation regime where the critical width Wc is much larger than the average step spacing In the simplest approximation discussed here, we incorporate the physics of the two state critical width model into the definition of the effective interaction term V(w) in Eq. (2), which in turn modifies the step chemical potential terms in Eqs. (7) and (8). Again we set V(w) = w/ l/w) as in Eq. (4) but now we use the /from Eq. (10) that takes account of reconstruction if a terrace is sufficiently wide. Note that this use of the two state model to describe an individual terrace with width w is more accurate than is the use of Eq. (10) to describe the properties of a macroscopic surface with average slope s = Mw. 

It is practically impossible to reconstruct the form of F(x) in detail by measuring the photocurrent. However, its first two moments can be measured in photoemission experiments. The first moment of the function F(x) is the projection of the average thermalization path length of electrons on the normal to the surface of the cathode ... 

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