Cation effects in doped La2CuO4 superconductors

J. P. Attfield (), A. L. Kharlanov and J. A. McAllister
Additional contact information
J. P. Attfield: Interdisciplinary Research Centre in Superconductivity, University of Cambridge

Nature, 1998, vol. 394, issue 6689, 157-159

Abstract: Abstract The critical temperatures of (Ln1−xMx)2CuO4 superconductors1, in which Ln3+ (La and other lanthanides) and M2+ (Ca, Sr, Ba) cations are randomly distributed amongst the ‘type A’ lattice sites, are known to depend on the doping level, x, and the mean A-site cation radius, 〈rA〉 (refs 2, 3). Here we show, by studying series of compositions with the same doping level and 〈rA〉, that the critical temperature decreases linearly with increasing A-site disorder, as quantified by the variance in the distribution of A-site cation radii. From this, we are able to show that, in the absence of disorder, the critical temperature should increase quadratically with 〈rA〉 for superconductors containing a single CuO2 layer. Our results therefore show that the critical temperature is very sensitive to lattice strains, as has also been shown for the metal to insulator transition temperature in the magnetoresistive (Ln1−xMx)MnO3 perovskites4.

Date: 1998
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/BF28120 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:394:y:1998:i:6689:d:10.1038_28120

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/28120

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().