@article {8733,
	title = {Bandgap engineering of rippled MoS2 monolayer under external electric field},
	journal = {Applied Physics Letters},
	year = {2013},
	doi = {10.1063/1.4803803},
	author = {Jing Shan Qi and Xiao Li and Xiaofeng Qian and Ji Feng}
}
