Discussion of Article 26 in Volume 3

This is a discussion of the MIJ-NSR article entitled Surface Structures, Surfactants and Diffusion at Cubic and Wurtzite GaN by T. Zywietz, Jörg Neugebauer, M. Scheffler, J. Northrup, Chris G. Van de Walle

Description of the paper by the reviewer(s):

Reviewer 1: The paper presents "high quality" first-principles electronic structure calculations of surface structure, surfactants and diffusion on cubic and wurtzite GaN surfaces. Several interesting findings were extracted from the calculations through analysis of surface electron density profiles, surface energies, and surface diffusion barriers for Ga and N adatoms.

This discussion is moderated by T. Zywietz.

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