Microscopic evidence of direct coupling between magnetic and superconducting order parameters in BaFe 2(As 1-xP x) 2

Tetsuya Iye, Yusuke Nakai, Shunsaku Kitagawa, Kenji Ishida, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Takahito Terashima

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23 Citations (Scopus)

Abstract

The coexistence of magnetism and superconductivity in the isovalent-P-substituted BaFe 2(As 1-xP x) 2 has been investigated microscopically by 31P-NMR measurements. We found that superconducting (SC) transition occurs in a magnetic region with static ordered moments and that the moments are reduced below the SC transition temperature T c in the samples near the phase boundary of magnetism and superconductivity. Our results indicate that magnetism and superconductivity coexist spatially but compete with each other on the same Fermi surfaces. The coexistence state is qualitatively different from that observed in other unconventional superconductors and gives a strict constraint on the theoretical model for superconductivity in BaFe 2(As 1-xP x) 2.

Original languageEnglish
Article number033701
Journaljournal of the physical society of japan
Volume81
Issue number3
DOIs
Publication statusPublished - Mar 1 2012

Keywords

  • Coexistence between magnetism and superconductivity
  • Iron-pnictide superconductors
  • NMR

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Iye, T., Nakai, Y., Kitagawa, S., Ishida, K., Kasahara, S., Shibauchi, T., Matsuda, Y., & Terashima, T. (2012). Microscopic evidence of direct coupling between magnetic and superconducting order parameters in BaFe 2(As 1-xP x) 2 journal of the physical society of japan, 81(3), [033701]. https://doi.org/10.1143/JPSJ.81.033701