1. Experimentalphysik V, Center for Electronic Correlations and Magnetism, Institute of Physics, Augsburg University 1 , D-86135 Augsburg, Germany
2. Materials Sciences Division, Lawrence Berkeley National Laboratory 2 , Berkeley, California 94720, USA
3. Molecular Foundry, Lawrence Berkeley National Laboratory 3 , Berkeley, California 94720, USA
4. Theoretische Physik III, Center for Electronic Correlations and Magnetism, Institute of Physics, Augsburg University 4 , D-86135 Augsburg, Germany
5. Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU) 5 , 7043 Trondheim, Norway
6. Institute of Applied Physics, Moldova State University 6 , MD 2028 Chişinǎu, R. Moldova
7. Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Romanian Academy 7 , 700487 Iasi, Romania