1. NEST, Istituto Nanoscienze—CNR and Scuola Normale Superiore, Piazza San
Silvestro 12, Pisa I-56127, Italy
2. Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-University, Montpellier 2, Montpellier, France
3. Università degli Studi della Calabria, Dipartimento di Fisica, via Ponte Bucci, 87036 Rende, Cosenza, Italy
4. V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Koptyuga prospekt 3, Novosibirsk 630090, Russian Federation
5. Institute of Catalisis and Inorganic Chemistry Department, Azerbaijan National Academy of Sciences, AZ-1143 Baku, Azerbaijan
6. Institute of Physics, Azerbaijan National Academy of Science, AZ1143 Baku, Azerbaijan
7. Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 13, Novosibirsk 630090, Russian Federation
8. Novosibirsk State University, ulica
Pirogova 2, Novosibirsk 630090, Russian Federation
9. Institute
of High Pressure Institute Physics, Polish Academy of Sciences, 01-447 Warsaw, Poland
10. Donostia International Physics Center (DIPC), CFM-MPC, Centro Mixto
CSIC-UPV/EHU, Departamento de Fisica de Materiales, UPV/EHU, E-20080 San Sebastian, Spain
11. Tomsk State University, Prospekt Lenin 36, 634050 Tomsk, Russian Federation
12. Saint Petersburg State University, Saint Petersburg 198504, Russian Federation