Author Affiliations +
Nikolai T. Bagraev,1 Wolfgang Gehlhoff,2 Vadim K. Ivanov,3 Leonid E. Klyachkin,1 Anna M. Malyarenko,1 Alexander Naeser,2 Serguei A. Rykov,3 Ivan A. Shelykh3
1A.F. Ioffe Physical-Technical Institute (Russia)
2Technische Univ. Berlin (Germany)
3St. Petersburg State Technical Univ. (Russia)