1. School of Materials Science
and Engineering, Nanyang Technological University, Block N4.1, 50 Nanyang Avenue, Singapore 639798
2. Condense Matter Theory Group,
Department of Physics and Astronomy, Box 516, Uppsala University, 751 20 Uppsala, Sweden
3. Applied Materials Physics, Department
of Materials and Engineering, Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden
4. Institute of High Performance Computing, 1 Fusionopolis Way, #16-16 Connexis,
Singapore 138632, Singapore