Structures of GaN(0001)-(2 × 2), -(4 × 4), and -(5 × 5) Surface Reconstructions

Qi Kun Xue, Q. Z. Xue, R. Z. Bakhtizin, Y. Hasegawa, I. S.T. Tsong, T. Sakurai, T. Ohno

Research output: Contribution to journalArticlepeer-review

97 Citations (Scopus)


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 languageEnglish
Pages (from-to)3074-3077
Number of pages4
JournalPhysical review letters
Issue number15
Publication statusPublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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