Microscopic evidence of the FFLO state in CeCoIn5 probed by NMR

K. Kumagai, K. Kakuyanagi, M. Saitoh, S. Takashima, M. Nohara, H. Takagi, Y. Matsuda

Research output: Contribution to journalArticle

1 Citation (Scopus)


We found an anomalous temperature dependence of 115In-NMR spectrum in the newly discovered high field and low-temperature superconducting phase of CeCoIn5. The anomalies near the upper limit of Hc 2 are attributed to spatially distributed local density of states of quasiparticles. From a simulation model with sinusoidally modulated superconducting order parameter, the present NMR study at a microscopic point of view provides a direct evidence that the Fulde-Ferrell-Larkin-Ovchinikov (FFLO) state is realized at the high-field phase in CeCoIn5.

Original languageEnglish
Pages (from-to)347-350
Number of pages4
JournalPhysica B: Condensed Matter
Issue numberSPEC. ISS.
Publication statusPublished - May 1 2006
Externally publishedYes


  • CeCoIn
  • FFLO
  • Heavy fermion compound
  • NMR
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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  • Cite this

    Kumagai, K., Kakuyanagi, K., Saitoh, M., Takashima, S., Nohara, M., Takagi, H., & Matsuda, Y. (2006). Microscopic evidence of the FFLO state in CeCoIn5 probed by NMR. Physica B: Condensed Matter, 378-380(SPEC. ISS.), 347-350. https://doi.org/10.1016/j.physb.2006.01.348