Spontaneous formation of a superconducting and antiferromagnetic hybrid state in SrFe2As2 under high pressure

K. Kitagawa, N. Katayama, H. Gotou, T. Yagi, K. Ohgushi, T. Matsumoto, Y. Uwatoko, M. Takigawa

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

We report a novel superconducting (SC) and antiferromagnetic (AF) hybrid state in SrFe2As2 revealed by As75 nuclear magnetic resonance (NMR) experiments on a single crystal under highly hydrostatic pressure up to 7 GPa. The NMR spectra at 5.4 GPa indicate simultaneous development of the SC and AF orders below 30 K. The nuclear spin-lattice relaxation rate in the SC domains shows a substantial residual density of states, suggesting proximity effects due to the spontaneous formation of a nanoscale SC-AF hybrid structure. This entangled behavior is a remarkable example of a self-organized heterogeneous structure in a clean system.

Original languageEnglish
Article number257002
JournalPhysical review letters
Volume103
Issue number25
DOIs
Publication statusPublished - 2009 Dec 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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