Bornemann, H. J. ; Morris, D. E. ; Liu, H. B. ; Sinha, A. P. B. ; Narwankar, P. ; Chandrachood, M. (1991) Correlation between oxygen isotope shift and Tc in 2-and 3-layer high temperature superconductors Physica C: Superconductivity, 185-189 (2). pp. 1359-1360. ISSN 0921-4534
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0921-4534(91)91903-H
Abstract
Oxygen isotope shift experiments were performed on several series of high temperature superconductors doped with various ions (isovalent and non-isovalent) at different sites. Substantial oxygen isotope shifts are found even above 70 K, but α 0 does not rise with decreasing Tc in all cases. Changes in Tc and α 0 can be correlated with the total hole concentration in several systems. Comparing different cuprate superconductors there appears to be an overall monotonic trend to lower values of α 0 with increasing Tc and number of copper layers. This trend continues even above 100 K where α 0 becomes negative in Bi-2223. Our results strongly suggest that all oxide high-temperature superconductors are phonon-coupled with near cancellation of α 0 by opposing effects when Tc is high.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 48946 |
| Deposited On: | 18 Jul 2011 10:21 |
| Last Modified: | 18 Jul 2011 10:21 |
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