Superconductivity at 43 K in an iron-based layered compound LaO1-xFxFeAs

Hiroki Takahashi (), Kazumi Igawa, Kazunobu Arii, Yoichi Kamihara, Masahiro Hirano and Hideo Hosono
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Hiroki Takahashi: College of Humanities and Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan
Kazumi Igawa: College of Humanities and Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan
Kazunobu Arii: College of Humanities and Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan
Yoichi Kamihara: ERATO-SORST, JST, Frontier Research Center,
Masahiro Hirano: ERATO-SORST, JST, Frontier Research Center,
Hideo Hosono: ERATO-SORST, JST, Frontier Research Center,

Nature, 2008, vol. 453, issue 7193, 376-378

Abstract: Iron oxypnictides: The hottest thing in superconductivity The hunt for new materials exhibiting high-temperature superconductivity is on again. A complex iron-based oxide, containing lanthanum and arsenic, was recently found to exhibit a transition temperature (Tc) of about 26 K when doped with fluoride ions. That's respectable, but far from the heights achieved in copper oxide superconductors. Now Takahashi et al. show that the application of around 40,000 atmospheres of pressure can raise the Tc of this material substantially, to about 43 K. This is the highest tc yet reported for a non-copper-based material. What is more, this record is unlikely to last for long: the complexity of 'iron oxypnictides' of this type offers considerable flexibility for chemical modification, and we can expect to hear of yet higher transition temperatures. This paper — and the prospect of a new wave of superconductor fever — is the subject of an Editorial in the 24 April issue of Nature (452, 914; 2008).

Date: 2008
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DOI: 10.1038/nature06972

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