Ab initio study of electronic structure of strained Si1-x-yGexCy/Ge(001) Liqing Wu, Meichun Huang, Shuping Li and Zizhong Zhu Eur. Phys. J. B, 12 4 (1999) 493-496 Published online: 15 December 1999 DOI: 10.1007/s100510051030