1. Materials DepartmentUniversity of California Santa Barbara CA 93106-5050 USA
2. US Naval Research LaboratoryCenter for Computational Materials Science Washington DC 20375 USA
3. Department of Physics and AstronomyStony Brook University Stony Brook NY 11794-3800 USA
4. Center for Computational Quantum PhysicsFlatiron Institute 162 5th Avenue New York NY 10010 USA
5. Department of Materials Science and EngineeringUniversity of California Berkeley CA 94720-1760 USA
6. Center for Physical Sciences and Technology (FTMC) Vilnius LT-10257 Lithuania