Abstract
Various reconstructions on the GaN(0001) surface are studied by scanning tunneling microscopy (STM). Based on the comparison between the STM observations and first-principles total-energy calculations, we propose an adatom scheme for the basic 2 × 2 and 4 × 4 structures, and others as well. It is revealed that the 5 × 5 phase consists of a linear chain of unevenly displaced Ga adatoms along the [ 1120] direction due to lattice relaxation.
Original language | English |
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Pages (from-to) | 3074-3077 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 82 |
Issue number | 15 |
DOIs | |
Publication status | Published - 1999 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)