THE COPPER ISOTOPE EFFECT IN OXYGEN-DEFICIENT YBA2CU3O7-DELTA

被引：31

作者：

FRANCK, JP

LAWRIE, DD

机构：

[1] Department of Physics, University of Alberta, Edmonton, T6G 2J1, AB

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1995年 / 8卷 / 05期

关键词：

ISOTOPE EFFECT; ELECTRON-PHONON INTERACTION;

D O I：

10.1007/BF00727433

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The copper isotope effect (Cu-63 - Cu-65) was investigated for oxygen-deficient YBa2Cu3O7-delta with transition temperatures between 40 and 91 K. The isotope exponent alpha(Cu) = Delta lnT(c)/Delta lnm(Cu) is negative for all transition temperatures. It is small, alpha(Cu) approximate to -0.14, in the 60 K plateau, and unobservable for T-C = 91 K. In regions away from these special conditions, alpha(CU) reaches large values of up to alpha(CU) = -0.4.

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页码：591 / 594

页数：4

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