1. Mathematics Institute, University of Warwick, Coventry CV4 7AL, United Kingdom
2. Warwick Centre for Predictive Modelling, School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom
3. Engineering Laboratory, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, United Kingdom
4. Center for Materials Physics and Technology, Naval Research Laboratory, Washington, DC 20375, USA
5. Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
6. Scientific Computing Department, STFC-Rutherford Appleton Laboratory Chilton, Oxfordshire OX11 0QX, United Kingdom