1. School of Physical & Material Sciences
2. Central University of Himachal Pradesh (CUHP)
3. Dharamshala
4. India
5. Center for Semiconductor Components and Nanotechnology (CCS Nano)
6. University of Campinas (UNICAMP)
7. 13083-870 Campinas
8. Brazil
9. Departamento de Física
10. Universidad de Santiago de Chile
11. Santiago 9170124
12. Chile