Direct observation of the interplay between stacking polytypes and self-intercalation in epitaxial Nb1+xSe2 films
Hongguang Wang, Jiawei Zhang, Chen Shen, Chao Yang, Kathrin Küster, Julia Deuschle, Ulrich Starke, Hongbin Zhang, Masahiko Isobe, Dennis Huang, Peter A. van Aken and Hidenori Takagi