1. School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore, Singapore.
2. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China.
3. Department of Physics, University of Texas at Austin, Austin, TX 78712, USA.
4. Center for Quantum Transport and Thermal Energy Science, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China.
5. Department of Physics and NUSNNI-Nanocore, National University of Singapore, 117411 Singapore, Singapore.
6. ARC Centre of Excellence in Future Low-Energy Electronics Technologies, School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia.
7. Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia.
8. School of Electrical and Electronic Engineering, Nanyang Technological University, 639798 Singapore, Singapore.
9. Global Innovative Centre for Advanced Nanomaterials, School of Engineering, The University of Newcastle, Callaghan New South Wales 2308 Australia.
10. Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China.