Unpinned Dirac Fermion States in 2D Materials with Phosphorene Lattice Structure

Yunhao Lu, 2, ∗ Di Zhou, Guoqing Chang, 4 Shan Guan, Weiguang Chen, Yinzhu Jiang, 2 Jianzhong Jiang, 2 Hsin Lin, 4, † Xue-sen Wang, Shengyuan A. Yang, ‡ Yuan Ping Feng, and Yoshiyuki Kawazoe 8 School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore 117546, Singapore Department of Physics, National University of Singapore, Singapore 117542, Singapore Research Laboratory for Quantum Materials, Singapore University of Technology and Design, Singapore 487372, Singapore College of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou 450044, China New Industry Creation Hatchery Center, Tohuku University, Sendai, 980-8579, Japan Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia