1. Department of Molecular Science and Technology; Ajou University; Suwon 443-749 South Korea
2. Department of Physics; Korea Advanced Institute of Science and Technology (KAIST); Daejeon 34141 South Korea
3. Institute of Computational Physics; Zurich University of Applied Sciences (ZHAW); 8401 Winterthur Switzerland
4. Department of Chemistry and Department of Energy Systems Research; Ajou University; Suwon 443-749 South Korea