Coexistence of superconductivity and antiferromagnetism in (Li0.8Fe0.2) OHFeSe

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • X. F. Lu
  • N. Z. Wang
  • H. Wu
  • Y. P. Wu
  • D. Zhao
  • X. Z. Zeng
  • X. G. Luo
  • T. Wu
  • G. H. Zhang
  • F. Q. Huang
  • Q. Z. Huang
  • X. H. Chen

Detail(s)

Original languageEnglish
Pages (from-to)325-329
Journal / PublicationNature Materials
Volume14
Issue number3
Online published15 Dec 2014
Publication statusPublished - Mar 2015
Externally publishedYes

Abstract

Iron selenide superconductors exhibit a number of unique characteristics that are helpful for understanding the mechanism of superconductivity in high-Tc iron-based superconductors more generally. However, in the case of AxFe2Se2 (A = K, Rb, Cs), the presence of an intergrown antiferromagnetic insulating phase makes the study of the underlying physics problematic. Moreover, FeSe-based systems intercalated with alkali metal ions, NH 3 molecules or organic molecules are extremely sensitive to air, which prevents the further investigation of their physical properties. It is therefore desirable to find a stable and easily accessible FeSe-based superconductor to study its physical properties in detail. Here, we report the synthesis of an air-stable material, (Li0.8Fe0.2 )OHFeSe, which remains superconducting at temperatures up to ∼40 K, by means of a novel hydrothermal method. The crystal structure is unambiguously determined by a combination of X-ray and neutron powder diffraction and nuclear magnetic resonance. Moreover, antiferromagnetic order is shown to coexist with superconductivity. This synthetic route opens a path for exploring superconductivity in other related systems, and confirms the appeal of iron selenides as a platform for understanding superconductivity in iron pnictides more broadly.

Citation Format(s)

Coexistence of superconductivity and antiferromagnetism in (Li0.8Fe0.2) OHFeSe. / Lu, X. F.; Wang, N. Z.; Wu, H. et al.
In: Nature Materials, Vol. 14, No. 3, 03.2015, p. 325-329.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review