Crystal symmetry, step-edge diffusion and unstable growth
| dc.creator | Politi, Paolo | |
| dc.creator | Krug, Joachim | |
| dc.date | 1999-08-10 | |
| dc.date | 1999-10-28 | |
| dc.date.accessioned | 2026-07-07T06:24:04Z | |
| dc.date.available | 2026-07-07T06:24:04Z | |
| dc.description | We study the effect of crystal symmetry and step-edge diffusion on the surface current governing the evolution of a growing crystal surface. We find there are two possible contributions to anisotropic currents, which both lead to the destabilization of the flat surface: terrace current (j_t), which is parallel to the surface slope, and step current (j_s), which has components parallel (j_pa) and perpendicular (j_pe) to the slope. On a high-symmetry surface, terrace and step currents are generically singular at zero slope, and this does not allow to perform the standard linear stability analysis. As far as a one-dimensional profile is considered, (j_pe) is irrelevant and (j_pa) suggests that mound sides align along [110] and [1-10] axes. On a vicinal surface, (j_s) destabilizes against step bunching; its effect against step meandering depends on the step orientation, in agreement with the recent findings by O.Pierre-Louis et al. [Phys. Rev. Lett. 82, 3661 (1999)]. | |
| dc.description | 7 pages, 3 embedded EPS figures. Added a final section and a list of symbols. Accepted for publication in Surface Science | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9908152 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9908152 | |
| dc.identifier | Surface Sci. 446, 89-97 (2000) | |
| dc.identifier | doi:10.1016/S0039-6028(99)01104-8 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/96421 | |
| dc.subject | Materials Science | |
| dc.title | Crystal symmetry, step-edge diffusion and unstable growth | |
| dc.type | text |