Atomic-scale perspective on the origin of attractive step interactions on Si(113)

Details Atomic-scale perspective on the origin of attractive step interactions on Si(113) Atomic-scale perspective on the origin of attractive step interactions on Si(113)

2003-04-24

arxiv.org/abs/cond-mat/0304564v2

Physical Review B, 68, 201302(R) (2003)

Physics

Condensed Matter

4 pages, 3 figures, to appear in Phys. Rev B, Rapid Communications

Scientific paper

10.1103/PhysRevB.68.201302

Recent experiments have shown that steps on Si(113) surfaces self-organize into bunches due to a competition between long-range repulsive and short-range attractive interactions. Using empirical and tight-binding interatomic potentials, we investigate the physical origin of the short-range attraction, and report the formation and interaction energies of steps. We find that the short-range attraction between steps is due to the annihilation of force monopoles at their edges as they combine to form bunches. Our results for the strengths of the attractive interactions are consistent with the values determined from experimental studies on kinetics of faceting.

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