1. Lobachevsky State University of Nizhny Novgorod, Gagarin Avenue,
23, Nizhny Novgorod, 603950 Russia
2. Institute of Low Temperature Science, Hokkaido University, Kita-19, Nishi-8, Kita-ku, Sapporo, 060-0819 Japan
3. Center for Fiber and Textile Science, Kyoto Institute of Technology, 105 Jibucho, Kyoto Fushimi-ku, Kyoto, 612-8374 Japan
4. Japan Advanced Institute of Science and Technology, Asahidai 1-1, Nomi-shi, Ishikawa, 923-1292 Japan