We investigate adatom self-diffusion on the rebonded step (RS) reconstructed Ge(105) surface. Activation energies for several paths are computed ab initio by applying the nudged elastic band method and used as input parameters for kinetic Monte Carlo simulations. We show that the RS reconstruction strongly influences adatom kinetics, which turns out to be fast at typical experimental temperatures, along both [010] and [(5) over bar 01] directions. The influence of strain on diffusion is also investigated. Our results are shown to be relevant for a better understanding of the growth modality of Ge pyramids on Si(001).
Montalenti, F., Migas, D., Gamba, F., Miglio, L. (2004). Fast isotropic adatom diffusion on Ge(105) dot facets. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 70(24), 1-8 [10.1103/PhysRevB.70.245315].
Fast isotropic adatom diffusion on Ge(105) dot facets
MONTALENTI, FRANCESCO CIMBRO MATTIA;MIGLIO, LEONIDA
2004
Abstract
We investigate adatom self-diffusion on the rebonded step (RS) reconstructed Ge(105) surface. Activation energies for several paths are computed ab initio by applying the nudged elastic band method and used as input parameters for kinetic Monte Carlo simulations. We show that the RS reconstruction strongly influences adatom kinetics, which turns out to be fast at typical experimental temperatures, along both [010] and [(5) over bar 01] directions. The influence of strain on diffusion is also investigated. Our results are shown to be relevant for a better understanding of the growth modality of Ge pyramids on Si(001).
| File | Dimensione | Formato | |
|---|---|---|---|
|
Fast_isotropic_adatom_diffusion_on_Ge(105)_dot_facets.pdf
accesso aperto
Tipologia di allegato:
Other attachments
Dimensione
614.2 kB
Formato
Adobe PDF
|
614.2 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
