Kun Ni^1,*, Jinxiang Du^1,*, Jin Yang^2,*, Shujuan Xu², Xin Cong³, Na Shu¹, Kai Zhang², Aolei Wang⁴, Fei Wang¹, Liangbing Ge¹, Jin Zhao^4,5, Yan Qu⁶, Kostya S. Novoselov⁷, Pingheng Tan³, Fuhai Su^2,†, and Yanwu Zhu^1,‡

• ¹Hefei National Research Center for Physical Sciences at the Microscale, and CAS Key Laboratory of Materials for Energy Conversion, and Department of Materials Science and Engineering, and iChEM, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
• ²Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
• ³State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People’s Republic of China
• ⁴Department of Physics, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, and ICQD/Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
• ⁵Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
• ⁶The Sixth Element (Changzhou) Materials Technology Co., Ltd., Changzhou 213100, China
• ⁷National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom, Centre for Advanced 2D Materials, National University of Singapore, 117546 Singapore and Chongqing 2D Materials Institute, Liangjiang New Area, Chongqing 400714, China

• ^*These authors contributed equally to this work.
• ^†To whom all correspondence should be addressed. fhsu@issp.ac.cn
• ^‡To whom all correspondence should be addressed. zhuyanwu@ustc.edu.cn