Anisotropic spin fluctuations and superconductivity in "115'' heavy fermion compounds: 59Co NMR study in PuCoGa5

Abstract

We report results of ${}^{59}$Co nuclear magnetic resonance measurements on a single crystal of superconducting PuCoGa5 in its normal state. The nuclear spin-lattice relaxation rates and the Knight shifts as a function of temperature reveal an anisotropy of spin fluctuations with finite wave vector q. By comparison with the isostructural members, we conclude that antiferromagnetic XY-type anisotropy of spin fluctuations plays an important role in mediating superconductivity in these heavy fermion materials.

Published in Phys. Rev. Lett

References in corpus (1)

• Hybridization and superconducting gaps in heavy-fermion superconductor PuCoGa5 probed via the dynamics of photoinduced quasiparticles

Cited by in corpus (5)

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• 125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2
• Extended Nuclear Quadrupole Resonance Study of the Heavy-Fermion Superconductor PuCoGa${}_5$
• Anisotropic spin fluctuations in the triangular Kondo lattice compound CePtAl${}_4$Ge${}_2$ probed by site-selective ${}^{27}$Al NMR
• Microscopic investigation of enhanced Pauli paramagnetism in metallic Pu${}_2$C${}_3$