Superconductivity in single-layer films of FeSe with a transition temperature above 100 K

Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China. Department of Physics, Tsinghua University, Beijing 100084, China. Department of Physics and Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA. *Correspondence to: canhualiu@sjtu.edu.cn; qkxue@mail.tsinghua.edu.cn; jfjia@sjtu.edu.cn.