1. STR Group - Soft-Impact, Ltd.; P.O. Box 83, 27 Engels ave. 194156 St. Petersburg Russia
2. CEMES-CNRS and Université de Toulouse; 29 rue Jeanne Marvig, BP 94347 31055 Toulouse Cedex 4 France
3. Ioffe Institute; 26 Polytekhnicheskaya str. 194021 St. Petersburg Russia
4. Submicron Heterostructures for Microelectronics Research and Engineering Center; 26 Polytekhnicheskaya str. 194021 St. Petersburg Russia