Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 19 August 1988:
Vol. 241. no. 4868, pp. 954 - 956
DOI: 10.1126/science.241.4868.954
Prev | Table of Contents | Next

Articles

The Incommensurate Modulation of the 2212 Bi-Sr-Ca-Cu-O Superconductor

YAN GAO 1, PETER LEE 1, PHILIP COPPENS 1, M. A. SUBRAMANIA 2, and A. W. SLEIGHT 2

1 Department of Chemistry and Institute on Superconductivity, State University of New York at Buffalo, Buffalo, NY 14214.
2 Central Research and Development Department, E. I. du Pont de Nemours Company, Experimental Station, Wilmington, DE 19898.

The incommensurate modulation evident in the diffraction pattern of the superconductor Bi2Sr3-xCaxCu2O8+y consists of almost sinusoidally varying displacements of up to 0.4Å of the Bi and Sr atoms in the a-and c-directions of the unit cell, and of up to 0.3 Å of the Cu atoms in the c direction only. Thus, a newly discovered feature of the Bi2Sr3-xCaxCu2O8+y structure is sizable Cu displacement, which is related to static wave formation in the Cu-O sheets. Reported thermal parameters give evidence that similar distortions occur on cooling of the thallium-containing superconductors.

Submitted on June 22, 1988
Accepted on July 19, 1988


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
From the Cover: Imaging the impact on cuprate superconductivity of varying the interatomic distances within individual crystal unit cells.
J. A. Slezak, J. Lee, M. Wang, K. McElroy, K. Fujita, B. M. Andersen, P. J. Hirschfeld, H. Eisaki, S. Uchida, and J. C. Davis (2008)
PNAS 105, 3203-3208
   Abstract »    Full Text »    PDF »
Structural and Electronic Role of Lead in (PbBi)2Sr2CaCu2O8 Superconductors by STM.
X. L. Wu, Z. Zhang, Y. L. Wang, and C. M. Lieber (1990)
Science 248, 1211-1214
   Abstract »    PDF »
Anomalous Scattering Study of the Bi Distribution in the 2212 Superconductor: Implications for Cu Valency.
P. LEE, Y. GAO, H. S. SHEU, V. PETRICEK, R. RESTORI,, P. COPPENS, A. DAROVSKIKH, J. C. PHILLIPS, A. W. SLEIGHT,, and M. A. SUBRAMANIAN (1989)
Science 244, 62-63
   Abstract »    PDF »
The Origin of the Superstructure in Bi2Sr2CaCu2O8+dgr as Revealed by Scanning Tunneling Microscopy.
M. D. Kirk, J. Nogami, A. A. Baski, D. B. Mitzi, A. Kapitulnik, T. H. Geballe, and C. F. Quate (1988)
Science 242, 1673-1675
   Abstract »    PDF »
Chemistry of High-Temperature Superconductors.
A. W. Sleight (1988)
Science 242, 1519-1527
   Abstract »    PDF »


ADVERTISEMENT
Click Me!

ADVERTISEMENT
Click Me!

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)