Adsorption effect on the formation of conductive path in defective TiO2: ab initio calculationsLei Li, Wenshi Li, Han Qin, Jianfeng Yang and Ling-Feng MaoEur. Phys. J. Appl. Phys., 80 1 (2017) 10104DOI: https://doi.org/10.1051/epjap/2017170157