Affiliation: | 1. Semiconductor Physics Institute of Center for Physical Sciences and Technology, A. Go?tauto 11, 01108, Vilnius, Lithuania 2. Vilnius Gediminas Technical University, Saul?tekio al. 11, 10223, Vilnius, Lithuania 3. Buskerud and Vestfold University College, Raveien 215, 3184, Borre, Norway
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