The Peierls instability and superconductivity in quasi-2-d La2-x(Ba,Sr)xCuO4 compounds |
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| Institution: | 1. Handan key Laboratory of Intelligent Awareness and Application, Handan University, Handan 056001, Hebei Province, China;2. Center for High Pressure Science, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei Province, China;3. Hebei Technology Innovation Center of Phase Change Thermal Management of Data Center, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, Hebei Province, China;4. School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China;1. Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, Henan, China;2. School of Mathematics and Informatics, Henan Polytechnic University, Jiaozuo City, 454003, Henan Province, China |
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| Abstract: | The Peierls instability in the quasi-2-d La2-x(Ba,Sr)xCuO4 is reexamined by taking the weak interlayer coupling into account. A two-step Peierls transition theory is developed, the general misunderstandings on the Peierls instability are therefore clarified, and a number of experimental anomalies observed in La2CuO4 are well explained. By suggesting an additional change of space group symmetries at the lower transition point, the calculated band structures are also intepreted. The possibility of CDW coexistence with the high-Tc superconductivity, the possible evidence for the 3-d superconductivity of the high-Tc materials are discussed with this theory. |
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