Reconstructions of the AlN(0001) surface
Reconstructions of the AlN(0001) were studied experimentally by STM (at CMU) and theoretically by first-principles total energy calculations (at PARC). Based on the experimental results and on first principles calculations it is argued that the reconstructions observed under Al-rich conditions involve a laterally contracted Al adlayer structure similar to that previously proposed for GaN(0001).
Northrup, J. E. ; Lee, C. D. ; Feenstra, R. M.; Neugebauer, J. Reconstructions of the AlN(0001) surface. Physical Review B. 2003 November 15; 68 (20): 205317.