Microscopic theory of atomic and electronic stretched exponential relaxation in high temperature superconductors

被引:16
作者
Phillips, JC [1 ]
机构
[1] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
来源
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2000年 / 340卷 / 04期
关键词
relaxation; stretched exponential; persistent photoconductivity; cuprates; electron-phonon interactions;
D O I
10.1016/S0921-4534(00)01506-9
中图分类号
O59 [应用物理学];
学科分类号
摘要
Measured dimensionless room-temperature conductivity relaxation stretching fractions beta in YBCO are in excellent agreement with theoretical predictions, which in 1995 identified two magic fractions, beta = 3/5 and beta = 3/7. Thus, relaxation studies provide an absolute measure of "ideality" in these complex materials, independent not only of composition x but even of crystal structure. The relaxation stretching fractions beta associated with T-c itself, reported in 2000, are also explained by the magic fraction beta = 3/5 predicted by microscopic theory. One can infer that the interactions responsible for high-temperature superconductivity are short range, non-magnetic, and primarily associated with resonant trapping centers in semiconductive layers. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:292 / 298
页数:7
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