at length scales as small as those of individual atoms, now let
us observe the propagation of mass flow under the electromigration
force as revealed by the motion of step edges. The patterned morphology
of the silicon surface in the figure is one example of such an investigation.
We have demonstrated that such pattern formation can be described
quantitatively using linear kinetics acting on the step chemical
potentials under the weak wind force. We are linking our developing
understanding of the apparently abstract problem of pattern formation
to understanding how electromigration forces are going to impact
the developing field of nanotechnology.
see K. Thürmer, et al. Physical Review Letters 83, 5531 (1999).