1. Department of Electrical and Computer Engineering, McGill University, 3480 University Street, Montreal, Quebec H3A 2A7, Canada
2. Department of Mining and Materials Engineering, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8, Canada
3. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
4. Centre for the Physics of Materials, Department of Physics, McGill University, 3610 University Street, Montreal, Quebec H3A 2T8, Canada
5. Defence Research and Development Canada Valcartier, 2459 Boulevard Pie XI North, Quebec, Quebec G3J 1X5, Canada