Doping effect of copper in germanium tellurium semiconducting glass system |
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| Institution: | 1. Department of Physics, University of the Punjab, Quaid-e-Azam Campus, 54590 Lahore, Pakistan;2. Physics Department, School of Science, University of Management and Technology, Lahore, Pakistan;3. Department of Physics, Hazara University, Mansehra, Pakistan;1. Hydrogen Energy Centre, Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India;2. Department of Materials Science and NanoEngineering, Rice University, Houston, TX, USA;1. State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;2. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;3. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China;4. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China;1. School of Electronic Science & Engineering, Southeast University, Nanjing 210096, Jiangsu Province, People''s Republic of China;2. School of Biological Sciences & Medical Engineering, Southeast University, Nanjing 210096, Jiangsu Province, People''s Republic of China;3. School of Physics, Alagappa University, Karaikudi 630004, India;4. Department of Physics, Annamalai University, Annamalainagar 608002, India;1. Department of Physics and Materials Science, Jaypee University of Information Technology, Waknaghat, Solan, HP 173234, India;2. Nano-Science and Semiconductor Laboratories, Department of Physics, Faculty of Education, Ain Shams University, Cairo, Egypt |
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| Abstract: | Addition of copper to the semiconducting glassy system Ge15Te85−xCux (x=2, 4, 5, 6, 8, and 10) at the tellurium site is seen to produce considerable changes in the glass transition temperature (Tg) of the system. For a particular value of copper percentage, the Tg shows a minimum critical value. We have made an attempt to explain the observed variation of Tg with Cu content on the basis of various models like the chemically ordered network model, the constraints theory, the covalent bond approach of Tichy and Ticha and former valence shell (FVS) model proposed by Liu and Taylor. |
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