1National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029 2Department of Electronic Science and Engineering, and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin 300071 3Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 4Hefei National Laboratory for Physical Science at Microscale and Department of Physics, and Key Laboratory of Strongly Coupled Quantum Matter Physics, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026 5Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031
Abstract：The band structures of two-monolayer Bi(110) films on black phosphorus substrates are studied using angle-resolved photoemission spectroscopy. Within the band gap of bulk black phosphorus, the electronic states near the Fermi level are dominated by the Bi(110) film. The band dispersions revealed by our data suggest that the orientation of the Bi(110) film is aligned with the black phosphorus substrate. The electronic structures of the Bi(110) film strongly deviate from the band calculations of the free-standing Bi(110) film, suggesting that the substrate can significantly affect the electronic states in the Bi(110) film. Our data show that there are no non-trivial electronic states in Bi(110) films grown on black phosphorus substrates.
2018, Vol. 35 
