The discovery of 30-K superconductivity in the La–Ba–Cu–O system1 and 90-K superconductivity in the Y–Ba–Cu–O system2 stimulated a worldwide search for even higher-temperature superconductors. Unfortunately, most of the higher-temperature transitions reported in the past year have proved to be unstable, irreproducible, or not due to bulk superconductivity3–7. Recently, we and co-workers8,9 reported superconductivity above 90 K in a new Tl–Ba–Cu–O system, and pointed out that elemental substitutions in this system may lead to even higher-temperature superconductivity. Here we report stable and reproducible bulk superconductivity with an onset at 120 K and zero resistance above 100 K in the Tl–Ca/Ba–Cu–O system. This transition temperature is much higher than those observed for typical rare-earth-containing superconductors, and the onset temperatures are comparable to that in the Bi–Ca/Sr–Cu–O system, as reported in refs 10 and 11 (received after submission of this paper).
This is a preview of subscription content, access via your institution
Open Access articles citing this article.
Communications Materials Open Access 28 January 2021
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Rent or buy this article
Prices vary by article type
Prices may be subject to local taxes which are calculated during checkout
Bednorz, J. G. & Müller, K. A. Z. Phys. B64, 189–193 (1986).
Wu, M. K. et al. Phys. Rev. Lett. 58, 908–910 (1987).
Chen, J. T., Wenger, L. E., McEwan, C. J. & Logothetis, E. M. Phys. Rev. Lett. 58, 1972–1975 (1987).
Ovshinsky, S. R., Young, R. T., Allred, D. D., DeMaggio, G. & Van der Leeden, G. A. Phys. Rev. Lett. 58, 2579–2581 (1987).
Cai, X., Joynt, R. & Larbalestier, D. G. Phys. Rev. Lett. 58, 2798–2801 (1987).
Bhargava, R. N., Herko, S. P. & Osborne, N. Phys. Rev. Lett. 59, 1468–1471 (1987).
Huang, C. Y. et al. Nature 328, 403–404 (1987).
Sheng, Z. Z. & Hermann, A. M. Nature 332, 55–58 (1988).
Sheng, Z. Z. et al. Phys. Rev. Lett. (in the press).
Maeda, H., Tanaka, Y., Fukutomi, M. & Asano, T. Jap. J. appl. Phys. Lett. (submitted).
Chu, C. W. et al. Phys. Rev. Lett. (submitted).
Hermann, A. M. & Sheng, Z. Z. Appl. Phys. Lett. 51, 1854–1856 (1987).
Murphy, D. et al. Phys. Rev. Lett. 58, 1888–1890 (1987).
Hor, P. H. et al. Phys. Rev. Lett. 58, 1891–1894 (1987).
Norton, N. L. J. Phys. E 19, 268–270 (1986).
Dietrich, M. R., Fietz, W. H., Ecke, J., Odest, B. & Politis, C. Z. Phys. B66, 284–287 (1987).
About this article
Cite this article
Sheng, Z., Hermann, A. Bulk superconductivity at 120 K in the Tl–Ca/Ba–Cu–O system. Nature 332, 138–139 (1988). https://doi.org/10.1038/332138a0
This article is cited by
Nature Materials (2023)
Journal of Electroceramics (2023)
Nature Synthesis (2022)
Communications Materials (2021)
The Needle in the Haystack for Theory of High-Temperature Superconductivity: Negative Nuclear Magnetic Moments
Journal of Superconductivity and Novel Magnetism (2020)