1. Physics Characterization and Simulations Lab (PCSL), Department of Physics, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
2. Department of Chemical and Petroleum Engineering, United Arab Emirates University (UAEU), Al-Ain 15551, United Arab Emirates
3. Microelectronics Research Center, The University of Texas at Austin, Austin, Texas 78758, United States