First-principles investigation of graphene on the ferroelectric LiNbO3(001) surface Jun Ding, Li-Wei Wen, Hai-Dong Li, Xiu-Bao Kang and Jian-Min Zhang EPL, 104 1 (2013) 17009 Published online: 15 November 2013 DOI: 10.1209/0295-5075/104/17009