1. Department of Materials and Interfaces Weizmann Institute of Science Rehovot 7610001 Israel
2. Department of Functional Inorganic Materials Academician Semenov Chernogolovka Moscow 142432 Russia
3. School of Physics Nanjing University Nanjing Jiangsu Province 210093 China
4. Department of Mathematics Cornell University Ithaca NY 14853 USA
5. Institute of Nanotechnology and Advanced Materials Department of Chemistry Bar‐Ilan University Ramat Gan 5290002 Israel
6. Department of Chemical Research Support Weizmann Institute of Science Rehovot 7610001 Israel