Batlogg, B. ; Cava, R. J. ; Jayaraman, A. ; Van Dover, R. B. ; Kourouklis, G. A. ; Sunshine, S. ; Murphy, D. W. ; Rupp, L. W. ; Chen, H. S. ; White, A. ; Short, K. T. ; Mujsce, A. M. ; Rietman, E. A. (1987) Isotope effect in the high-Tc superconductors Ba2YCu3O7 and Ba2EuCu3O7 Physical Review Letters, 58 (22). pp. 2333-2336. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v58/i22/p2333_1
Related URL: http://dx.doi.org/10.1103/PhysRevLett.58.2333
Abstract
We have studied the effect of isotopic substitution on the superconducting Tc in the 90-K superconductors Ba2YCu3O7 and Ba2EuCu3O7 by replacing 16O with the heavier isotope 18O. Samples with approximately 75% of the 16O replaced by 18O were prepared by gas-phase ion exchange. In these samples the phonon frequencies, measured by Raman spectroscopy, are reduced by the expected ~4%. The transition temperatures, however, are found to change by less than 0.2%. This change in Tc is much less than that expected for strongly coupled phonon-mediated superconductivity.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 13277 |
| Deposited On: | 11 Nov 2010 08:14 |
| Last Modified: | 06 Jun 2011 05:36 |
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