Naslov
Interaction of low-energy nitrogen ions with GaAs surfaces

Autori
Majlinger, Zlatko ; Božanić, Ana ; Petravić, Mladen ; Kim, K.-J. ; Kim, B. ; Yang, Y.-W.

Izvornik
Journal of applied physics (0021-8979) 104 (2008); 063527-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
NEXAFS; GaAs

Sažetak
We have studied the interaction of low-energy nitrogen ions (0.3-2 keV N2+) with GaAs (100) surfaces by photoemission spectroscopy (PES) around N 1s and Ga 3d core-levels and near- edge x-ray absorption fine structure (NEXAFS) around the N K- edge. At the lowest bombardment energy, nitrogen forms bonds with both Ga and As, while Ga-N bonds form preferentially at higher energies. Thermal annealing at temperatures above 350oC promotes the formation of GaN on the surface, but it is insufficient to remove the disorder introduced by ion implantation. Nitrogen interstitials and antisites have been identified in NEXAFS spectra, while interstitial molecular nitrogen provides a clear signature in both PES and NEXAFS.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA