Directly visualizing the sign change of d-wave superconducting gap in Bi2Sr2CaCu2O8+δ by phase-referenced quasiparticle interference

by Qiangqiang Gu, Siyuan Wan, Qingkun Tang, Zengyi Du, Huan Yang, Qiang-Hua Wang, Ruidan Zhong, Jinsheng Wen, G. D. Gu, Hai-Hu Wen
Published 2019-04-01