Possible electron-exciton (E-E) interaction and high Tc superconductivity in bulk semimetals |
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| Institution: | 1. Department of Physics, Peking University, Beijing, China;2. China Center of Advanced Science and Technology, China;1. Department of Physics, Indian Institute of Technology Bombay, Mumbai, 400076, India;2. Department of Electrical Engineering IIT Bombay, Powai, Mumbai, 400076, India;1. Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Ghaziabad, Uttar Pradesh 201002, India;2. Electrical & Electronics Metrology Division, National Physical Laboratory, Council of Scientific and Industrial Research, Dr. K. S. Krishnan Marg, New Delhi 110012, India;1. Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India;2. CSIR- National Physical Laboratory, New Delhi, 110012, India;3. Institute of Superconducting and Electronic Materials, University of Wollongong, NSW, 2522, Australia;1. Department of Mathematical Sciences, Indian Institute of Technology (BHU), Varanasi 21005, India;2. Department of Mathematics, Faculty of Mathematical Sciences, University of Mazandaran, Babolsar, Iran;3. Institute of Mathematical Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia |
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| Abstract: | In relation to the high Tc recently observed in YBaCuO systems, the possibility of formation of Cooper pairs by virtual exciton exchange in a single phase is analysed. Electron-Exciton coupling matrix elements and possible optimum condition of superconducting Tc and its upper limit are evaluated. It shows that this kind of superconductivity may display some different features compared with usual BCS superconducting phase. |
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