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

doi:10.1103/PhysRevLett.82.3074

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 journal › Article › peer-review

96 Citations (Scopus)

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
Pages (from-to)	3074-3077
Number of pages	4
Journal	Physical review letters
Volume	82
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.82.3074
Publication status	Published - 1999
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.82.3074

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AU - Xue, Qi Kun

AU - Xue, Q. Z.

AU - Bakhtizin, R. Z.

AU - Hasegawa, Y.

AU - Tsong, I. S.T.

AU - Sakurai, T.

AU - Ohno, T.

PY - 1999

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AB - 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.

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

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