Affiliation: | a Department SF8, Hahn-Meitner-Institute, Berlin, Germany b Department of Physics and Astrophysics, University of Delhi, Delhi, India c Institute of Electrotechnique, Fernuniversität, Hagen, Germany d South Westfalia University of Applied Sciences, Hagen, Germany e Al-Balqa University, Amman, Jordan f Department of Advanced Materials Engineering, Sungkyunkwan University, Suwon, Korea g Department of Physics, University of Pune, Pune, India h Institute of Physics, Novosibirsk State Technical University, Russian Federation i Kopernikus-Oberschule, Berlin, Germany j Herder-Gymnasium, Berlin, Germany |