Texture in the Superconducting Order Parameter ofCeCoIn5Revealed by Nuclear Magnetic Resonance

2004/05/28 by Kosuke Kakuyanagi, K. Kakuyanagi, Mika Saitoh +8 · 6 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.94.047602

5 pages, 4 figures

arxiv created 2004/05/28 · openalex publication_date 2005/02/02 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We present a 115In NMR study of the quasi-two-dimensional heavy-fermion superconductor CeCoIn5 believed to host a Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) state. In the vicinity of the upper critical field and with a magnetic field applied parallel to the ab plane, the NMR spectrum exhibits a dramatic change below T*(H) which well coincides with the position of reported anomalies in specific heat and ultrasound velocity. We argue that our results provide the first microscopic evidence for the occurrence of a spatially modulated superconducting order parameter expected in a FFLO state. The NMR spectrum also implies an anomalous electronic structure of vortex cores.

Cited by

• Pairing between atoms and molecules in a boson-fermion resonant mixture
• Observations of Pauli paramagnetic effects on the flux line lattice in CeCoIn5
• The Fulde–Ferrell–Larkin–Ovchinnikov phase in the presence of pair hopping interaction
• The Fulde–Ferrell–Larkin–Ovchinnikov State in Pnictides
• Hyperfine Fields and Magnetic Structure in the B Phase of CeCoIn5
• Anomalous quasiparticle transport in the superconducting state ofCeCoIn5