O. V. Vasileva
Chuvash State University named after I.N. Ulyanov
Russian Federation

postgraduate, senior lecturer, Department of Applied Physics and Nanotechnology, the Chuvash State University named after I.N. Ulyanov

S. I. Ksenofontov
Chuvash State Pedagogical University named after I.Y. Yakovlev
Russian Federation

PhD (physics and mathematics), professor, Department of General and Theoretical Physics, the Chuvash State Pedagogical University named after I.Y. Yakovlev

A. G. Krasnova
Chuvash State University named after I.N. Ulyanov
Russian Federation

postgraduate, assistant professor, Department of Applied Physics and Nanotechnology, the Chuvash State University named after I.N. Ulyanov

A. V. Kokshina
Chuvash State University named after I.N. Ulyanov
Russian Federation

postgraduate, assistant professor, Department of Applied Physics and Nanotechnology, the Chuvash State University named after I.N. Ulyanov