Zhang Zhong-Qiang, Jia Yu-Xia, Guo Xin-Feng, Ge Dao-Han, Cheng Guang-Gui, Ding Jian-Ning. Characteristics of interaction between single-layer graphene on copper substrate and grooveJ. Acta Physica Sinica, 2018, 67(3): 033101. DOI: 10.7498/aps.67.20172249