Comment on ``Texture in the Superconducting Order Parameter of CeCoIn${}_5$ Revealed by Nuclear Magnetic Resonance''

Abstract

The study of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state has been of considerable recent interest. Below the temperature $T^{\ast }$ which is believed to be the transition temperature ($T$) to the FFLO phase in CeCoIn${}_5$, K. Kakuyanagi et al. (Phys. Rev. Lett. 94, 047602 (2005)) reported a composite NMR spectrum with a tiny component observed at frequencies corresponding to the normal state signal. The results were interpreted as evidence for the emergence of an FFLO state. This result is inconsistent with two other NMR studies of V. F. Mitrovi{ć} et al. (Phys. Rev. Lett. 97, 117002 (2006)) and B.-L. Young et al. (Phys. Rev. Lett. 98, 036402 (2007)). In this comment we show that the findings of K. Kakuyanagi et al. do not reflect the true nature of the FFLO state but result from excess RF excitation power used in that experiment.

1 page, to appear in PRL

References in corpus (4)

• Texture in the Superconducting Order Parameter of CeCoIn_5 Revealed by Nuclear Magnetic Resonance
• Microscopic evidence for field-induced magnetism in CeCoIn${}_5$
• Observation of Spin Susceptibility Enhancement in the Possible FFLO State in CeCoIn${}_5$
• Vortex state in a Fulde-Ferrell-Larkin-Ovchinnikov superconductor based on the quasiclassical theory

Cited by in corpus (6)

• Nuclear magnetic resonance in the heavy fermion superconductors
• Observations of Pauli Paramagnetic Effects on the Flux Line Lattice in CeCoIn5
• Field-induced coupled superconductivity and spin density wave order in the Heavy Fermion compound CeCoIn5
• Hyperfine fields and magnetic structure in the B phase of CeCoIn5
• Signatures of electronic correlations and spin-susceptibility anisotropy in nuclear magnetic resonance
• Dynamic Simulations of Strongly Coupled Spin Ensembles for Inferring Nature of Electronic Correlations from Nuclear Magnetic Resonance