1. Department of Physics, University of Ottawa, Ottawa, Ontario K1N 9A7, Canada
2. Emerging Technologies Division, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
3. Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
4. International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
5. Department of Theoretical Physics, Wroclaw University of Science and Technology, Wroclaw, Poland