1. Engineering Department, Lancaster University, Lancaster LA1 4YR, United Kingdom
2. Faculty of Electronics and Computer Engineering, Universiti Teknikal Malaysia Melaka (UTeM) Durian Tunggal, Melaka 76100, Malaysia
3. Department
of Physics, Lancaster University, Lancaster LA1 4YW, United Kingdom
4. Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, United Kingdom
5. Quantum
Nanoelectronics Research Center (QNERC), Tokyo Institute of Technology, 2-12-1
Ookayama, Meguro-ku, Tokyo 152-8550, Japan