Common features in high Tc cuprates and diborides |
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| Affiliation: | 1. The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Lab for NeuroInformation, Center for Information in Medicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731, China;2. Department of Hydraulic Engineering, School of Civil Engineering, Tsinghua University, Beijing 100084, China;3. Jinling Hospital, Nanjing 210002, Jiangsu, China;4. Research Unit of NeuroInformation, Chinese Academy of Medical Sciences, 2019RU035 Chengdu, China;5. School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China;1. College of Mechanical and Transportation Engineering, China University of Petroleum—Beijing, 18 Fuxue Road, Changping, Beijing 102249, China;2. College of Petroleum Engineering, China University of Petroleum—Beijing, 18 Fuxue Road, Changping, Beijing 102249, China;1. Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland;2. Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska Street 64, Kyiv 01601, Ukraine;1. Department of Geology, California State University, 5500 University Parkway, San Bernardino, CA 92407, USA;2. Department of Earth Sciences, University of California Riverside, 900 University Avenue, Riverside, CA 92521, USA;3. Malbunka Copper Mine, 5 Tenth Avenue, West Moonah, Tasmania 7009, Australia;4. Mineral Resources Tasmania, PO Box 56, Rosny Park, Tasmania 7018, Australia;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;2. State Key Laboratory of Advanced Nonferrous Materials Process and Recycles, Lanzhou University of Technology, Lanzhou 730050, PR China;3. University of Chinese Academy of Sciences, Beijing 100039, PR China |
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| Abstract: | The normal state of magnesium diboride, the simplest metallic system showing the macroscopic quantum coherence at high temperature (high Tc superconductivity––HTcS) shows some features that are common with the cuprates, shedding light on the pairing mechanism for Tc amplification in HTcS: (1) two or more electronic components associated with multiple Fermi surface portions; (2) crossing of electronic topological transitions (ETT) where the Fermi surface changes its topology and (3) phonon softening in extended Kohn anomalies (EKA) over a large wave-vector range. |
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