2011/03/08 by K. Kumagai, Hiroaki Shishido, H. Shishido +3 · 3 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Field (mathematics) #Iron-based superconductors research #Magnetic field #Magnetization #NMR spectra database #Order (exchange) #Paramagnetism #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Rare-earth and actinide compounds #Spectral line #Spin (aerodynamics) #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.106.137004
4 pages, 4 figures, accepted for publication in Phys. Rev. Lett
arxiv created 2011/03/08 · openalex publication_date 2011/03/30 · arxiv updated 2015/05/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present (115)In NMR measurements in a novel thermodynamic phase of CeCoIn(5) in a high magnetic field, where exotic superconductivity exists with the incommensurate spin-density wave order. We show that the NMR spectra in this phase provide direct evidence for the emergence of the spatially distributed normal quasiparticle regions. The quantitative analysis for the field evolution of the paramagnetic magnetization and newly emerged low-energy quasiparticle density of states is consistent with the nodal plane formation, which is characterized by an order parameter in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. The NMR spectra also suggest that the spatially uniform spin-density wave is induced in the FFLO phase.