1. School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
2. Division
of Physics and Applied Physics, School of
Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
3. Department
of Physics and Astronomy, Uppsala University, Box 516, Uppsala 75120, Sweden
4. Institute
of High Performance Computing, Agency for Science, Technology and Research, 1 Fusionopolis Way, #16-16 Connexis North, Singapore 138632, Singapore