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无机材料学报

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Bi2Sr2CaCu2O8高温超导体中临界温度的变化规律

史迅1,2   

  1. 1.中国科学院上海硅酸盐研究所,关键陶瓷材料全国重点实验室,上海 200050;
    2.中国科学院大学,材料科学与光电工程中心, 北京 100049
  • 收稿日期:2026-03-23 修回日期:2026-03-25

Physical trend for critical temperature in Bi2Sr2CaCu2O8 high-temperature superconductors

SHI Xun1,2   

  1. 1. State Key Laboratory of High Performance Ceramics, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
    2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2026-03-23 Revised:2026-03-25
  • Contact: SHI Xun, professor. E-mail: xshi@mail.sic.ac.cn
  • About author:SHI Xun (1976-), male, PhD. E-mail: xshi@mail.sic.ac.cn
  • Supported by:
    National Natural Science Foundation of China (52588301)

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摘要： 超导是凝聚态物理和材料科学领域极具研究价值且至关重要的方向。目前,已有多种材料在常压下展现出超导特性,其超导临界温度(TC)分布范围极广。传统的BCS理论(Bardeen-Cooper-Schrieffer theory)成功解释了低临界温度金属的超导特性,但目前尚缺乏针对高温超导体的有效理论模型。本工作以钇(Y)掺杂的Bi2Sr2CaCu2O8为例,研究发现TC与空穴浓度之间存在显著的幂律关系,较高的空穴浓度有利于实现高TC。本研究为未来新型高温超导体的研究提供了有益的理论指导。

关键词: 超导, 临界温度, 物理趋势, Bi2Sr2CaCu2O8

Abstract: Superconductivity is extremely interesting and important in condensed matter physics and material science. Currently, there are many types of materials to show superconductivity with a critical temperature (TC) locating in a large range under normal pressure. Compared with the successful Bardeen-Cooper-Schrieffer (BCS) theory for low TC metals, there are no effective model and theory for high-temperature superconductors. In this work, taking Y-doped Bi2Sr2CaCu2O8 as an example, we show that a power law relationship is obtained for TC and hole concentrations. A large hole concentration is beneficial to realize a high TC. This work provides a useful guidance for the future discovery of high TC superconductors.

Key words: superconductivity, critical temperature, physical trend, Bi2Sr2CaCu2O8

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