Abstract
RECENT work1,2has shown that superconducting copper oxyhalides can be synthesized, with the La2CuO4structure but with no oxygen in the ‘apical’ positions outside the CuO2 planes. For these materials to be rendered superconducting, charge carriers must be introduced into the CuO2 planes; in previous work, positive carriers (holes) have been introduced by the incorporation of interstitial fluorine in Sr2CuO2F2+δ (transition temperature Tc = 46 K)1, or by the substitution of sodium for calcium in (Ca,Na)2CuO2Cl2 (Tc = 26 K)2. Here we present an alternative doping approach for this copper oxyhalide family: holes are introduced by partially replacing the (monovalent) halogen that occupies the apical sites with (divalent) oxygen. We have obtained bulk superconductivity with Tc above 77 K in a new double-layer compound (Sr,Ca)3Cu2O4+δCl2-y, which is isostructural with (La,Sr)2-CaCu2O6 (ref. 3), with (Sr,Ca) at the (La,Sr) or Ca sites, and Cl at the apical sites outside the CuO2 planes.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Al-Mamouri, M., Edwards, P. P., Greaves, C. & Slaski, M. Nature 369, 382–384 (1994).
Hiroi, Z., Kobayashi, N. & Takano, M. Nature 371, 139–141 (1994).
Cava, R. J. et al. Nature 345, 602–604 (1990).
Adachi, S., Yamauchi, H., Tanaka, S. & Môri, N. Physica C208, 226–230 (1993); 212, 164–168 (1993).
Jin, C.-Q., Adachi, S., Wu, X.-J., Yamauchi, H. & Tanaka, S. Physica C223, 238–242 (1994); in Advances in Superconductivity Vol. 7 (Springer, Tokyo, in the press).
Yamauchi, H., Tamura, T., Wu, X.-J., Adachi, S. & Tanaka, S. Jap. J. appl. Phys. 34, L349–L351 (1995).
Hiroi, Z., Takano, M., Azuma, M. & Takeda, Y. Nature 364, 315–317 (1993).
Laffez, P., Wu, X. J., Adachi, S., Yamauchi, H. & Môri, N. Physica C222, 303–309 (1994).
Müller-Buschbaum, H. Angew. Chem. int. Edn. engl. 16, 674–687 (1977).
Miller, L. L. et al. Phys. Rev. B41, 1921–1925 (1990).
Shannon, R. D. & Prewitt, C. T. Acta Crystallogr. B25, 925–945 (1969).
Zhang, H. & Sato, H. Phys. Rev. Lett. 70, 1697–1699 (1993).
Chaillout, C. et al. Physica C158, 183–191 (1989).
Siegrist, T., Zahurak, S. M., Murphy, D. W. & Roth, R. S. Nature 334, 231–232 (1988).
Shaked, H. et al. Phys. Rev. B48, 12941–12950 (1993).
Uehara, M., Nakata, H. & Akimitsu, J. Physica C216, 453–457 (1993).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Jin, CQ., Wu, XJ., Laffez, P. et al. Superconductivity at 80 K in (Sr,Ca)3Cu2O4+δCl2-y induced by apical oxygen doping. Nature 375, 301–303 (1995). https://doi.org/10.1038/375301a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/375301a0
This article is cited by
-
Superconducting and structural properties of the phosphorus-rich Nb2P5 superconductor under high pressure
Tungsten (2023)
-
Calcium-free double-layered cuprate superconductors with critical temperature above 100 K
Communications Materials (2021)
-
Momentum-resolved visualization of electronic evolution in doping a Mott insulator
Nature Communications (2021)
-
A combinatory ferroelectric compound bridging simple ABO3 and A-site-ordered quadruple perovskite
Nature Communications (2021)
-
High-pressure synthesis, crystal structure and physical properties of a new Cr-based arsenide La3CrAs5
Science China Materials (2020)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.