1. V. E. Lashkaryov Institute of Semiconductor Physics
2. National Academy of Sciences of Ukraine
3. Ukraine
4. NEST
5. Scuola Normale Superiore
6. Istituto Nanoscienze-CNR
7. Pisa
8. Italy
9. Dipartimento di Fisica
10. Università di Roma “Tor Vergata”
11. 00133 Roma
12. CNRS
13. Aix-Marseille Université
14. IM2NP
15. UMR 7334
16. 13397 Marseille