Bi2Sr2CaCu2O8高温超导体中临界温度的变化规律

doi:10.15541/jim20260128

无机材料学报 ›› 2026, Vol. 41 ›› Issue (6): 847-848.DOI: 10.15541/jim20260128

• 研究亮点 • 上一篇

Bi₂Sr₂CaCu₂O₈高温超导体中临界温度的变化规律

史迅¹^,²()

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 出版日期:2026-06-20 网络出版日期:2026-03-25
通讯作者: 史迅, 研究员. E-mail: xshi@mail.sic.ac.cn
作者简介:史迅(1976-), 男, 博士. E-mail: xshi@mail.sic.ac.cn

Physical Trend for Critical Temperature in Bi₂Sr₂CaCu₂O₈ High-temperature Superconductors

SHI Xun¹^,²()

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 Published:2026-06-20 Online: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)

摘要/Abstract

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(T_C)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T_C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T_C。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, many types of materials exhibit superconductivity with a critical temperature (T_C) located in a large range under normal pressure. Compared with the successful Bardeen-Cooper-Schrieffer (BCS) theory for low-T_C metals, there are no effective model and theory for high-temperature superconductors. In this work, taking Y-doped Bi₂Sr₂CaCu₂O₈ as an example, a power law relationship is obtained for T_C and hole concentration. A large hole concentration is beneficial to realize a high T_C. This work provides useful guidance for the future discovery of high T_C superconductors.

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

中图分类号:

TM26

史迅. Bi₂Sr₂CaCu₂O₈高温超导体中临界温度的变化规律[J]. 无机材料学报, 2026, 41(6): 847-848.

SHI Xun. Physical Trend for Critical Temperature in Bi₂Sr₂CaCu₂O₈ High-temperature Superconductors[J]. Journal of Inorganic Materials, 2026, 41(6): 847-848.

图/表 3

Fig. 1 Crystal structure of the Bi-2212[11]

Fig. 2 TC as a function of hole concentration (p) for pure and Y-doped Bi-2212 superconductors The experiment data are taken from Ref. [10]

Table 1 Physical parameters of pure and Y-doped Bi-2212 (the data are taken from the Ref. [10])

Y content	p (300 K)/(×10²⁷, m^-3)	T_C/K
0.45	0.83	0
0.40	1.25	20
0.30	2.08	30
0.20	2.71	60
0.10	3.90	82
0	4.46	75

参考文献 12

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[9]	MAEDA H, TANAKA Y, FUKUTOMI M, et al. A new high-T_c oxide superconductor without a rare earth element. Japanese Journal of Applied Physics, 1988, 27(2A): L209.
[10]	MAEDA A, HASE M, TSUKADA I, et al. Physical properties of Bi₂Sr₂Ca_n_-1Cu_nO_y (n=1, 2, 3). Physical Review B, 1990, 41(10): 6418.
[11]	SUBRAMANIAN M A, TORARDI C C, CALABRESE J C, et al. A new high-temperature superconductor: Bi₂Sr_3-_xCa_xCu₂O₈₊_y. Science, 1988, 239(4843): 1015.
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Bi₂Sr₂CaCu₂O₈高温超导体中临界温度的变化规律

Physical Trend for Critical Temperature in Bi₂Sr₂CaCu₂O₈ High-temperature Superconductors

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