Thermodynamics of wurtzite GaN from first-principle calculation Huan-You Wang, Hui Xu, Tie-Tie Huang and Chao-Sheng Deng Eur. Phys. J. B, 62 1 (2008) 39-43 Published online: 21 March 2008 DOI: 10.1140/epjb/e2008-00121-2