Khasanov R, Shengelaya A, Di Castro D, Morenzoni E, Maisuradze A, Savić I M, Conder K, Pomjakushina E, Bussmann-Holder A, Keller H
Physik-Institut der Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
Phys Rev Lett. 2008 Aug 15;101(7):077001. doi: 10.1103/PhysRevLett.101.077001. Epub 2008 Aug 11.
The various phases observed in all cuprate superconductors [superconducting (SC), spin-glass (SG), and antiferromagnetic (AFM)] were investigated with respect to oxygen-isotope (16O/18O) effects, using here as a prototype system of cuprates Y1-xPrxBa2Cu3O7-delta. All phases exhibit an isotope effect which is strongest where the respective phase terminates. In addition, the isotope effects on the magnetic phases (SG and AFM) are sign reversed as compared to the one on the superconducting phase. In the coexistence regime of the SG and SC phase a two-component behavior is observed where the isotope induced decrease of the superfluid density leads to a corresponding enhancement in the SG related density.
针对所有铜酸盐超导体（超导相（SC）、自旋玻璃相（SG）和反铁磁相（AFM））中观察到的不同相，以Y1-xPrxBa2Cu3O7-δ铜酸盐作为原型系统，研究了氧同位素（16O/18O）效应。所有相均表现出同位素效应，且在各相终止处效应最强。此外，与超导相对同位素效应的响应相比，磁相（SG和AFM）上的同位素效应符号相反。在SG相和SC相的共存区域，观察到一种双组分行为，其中同位素引起的超流密度降低导致SG相关密度相应增加。
