Rao, C. N. R. (1989) Certain novel aspects of thallium and bismuth cuprate superconductors MRS Proceedings, 169 . pp. 111-118. ISSN 1946-4274
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Official URL: http://journals.cambridge.org/action/displayAbstra...
Related URL: http://dx.doi.org/10.1557/PROC-169-111
Abstract
Novel superconducting thallium cuprates of the type TlCa1−XLnXSr2Cu2O6+δ (Ln=Y or rare earth), TlSrn+1−xLnxCunOY and Tl1−xPbXSrn+1Cun08+δ are described. These cuprates as well as Bi2Ca1−xLnxSr2Cu2O8+δ and TlCa1−xYxBa2Cu2O6+δ show maximum T around a specific composition or oxygen content. They also show interesting changes in the sign and magnitude of the thermopower with the composition. Specially noteworthy is the negative slope of the thermopower-temperature plots. The thermopower behaviour in these two-band systems can be understood in terms of entropie and quasiparticle contributions. It appears that Tl1−xPbxCaSr2Cu2O6+δ is a genuine high T electron superconductor.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Cambridge University Press. |
| ID Code: | 44786 |
| Deposited On: | 23 Jun 2011 05:24 |
| Last Modified: | 23 Jun 2011 05:24 |
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