1. Theoretical Chemistry, Technische Universität Dresden 1 , 01062 Dresden, Germany
2. Institute of Ion Beam Physics and Materials Research 2 , Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
3. Center for Autonomous Materials Design, Duke University 3 , Durham, North Carolina 27708, USA
4. Materials Science, Electrical Engineering, and Physics, Duke University 4 , Durham, North Carolina 27708, USA