First principles calculations of the relaxed structural and electronic properties of Cu nanobelts F.-L. Zheng, Y. Zhang, J.-M. Zhang and K.-W. Xu Eur. Phys. J. B, 78 1 (2010) 87-93 Published online: 20 October 2010 DOI: 10.1140/epjb/e2010-10243-5