THEORY OF SURFACE-MORPHOLOGY OF WURTZITE GAN(0001) SURFACES

Authors
RAPCEWICZ K NARDELLI MB BERNHOLC J
Citation
K. Rapcewicz et al., THEORY OF SURFACE-MORPHOLOGY OF WURTZITE GAN(0001) SURFACES, Physical review. B, Condensed matter, 56(20), 1997, pp. 12725-12728
Citations number
24
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
56
Issue
20
Year of publication
1997
Pages
12725 - 12728
Database
ISI
SICI code
0163-1829(1997)56:20<12725:TOSOWG>2.0.ZU;2-F
Abstract
The influence of growth conditions and surface polarity upon the morph ology of (0001) GaN surfaces is studied from first principles. The cha rge transfer between the Ga and N atoms in GaN and the very large elec tronegativity of nitrogen are found to play decisive roles in determin ing the stable reconstructions. Further, hydrogen stabilizes the ideal ly cleaved surface irrespective of polarity. For both polarities, adso rption of 3/4 of a monolayer of hydrogen results in a very stable surf ace with a 2x2 symmetry.