1. Department of Physics, Faculty of Sciences, Ankara University, 06100 Tandogan, Ankara, Turkey
2. Department of Physics Engineering, Faculty of Engineering, Ankara University, 06100, Ankara, Turkey
3. Department of Physics, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
4. Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands