Magnetic field splitting of the spin-resonance in CeCoIn5

Abstract

Neutron scattering in strong magnetic fields is used to show the spin-resonance in superconducting CeCoIn5 (Tc=2.3 K) is a doublet. The underdamped resonance (\hbar Γ=0.069 \pm 0.019 meV) Zeeman splits into two modes at E_{\pm}=\hbar Ω_{0}\pm gμ_{B} μ_{0}H with g=0.96 \pm 0.05. A linear extrapolation of the lower peak reaches zero energy at 11.2 \pm 0.5 T, near the critical field for the incommensurate "Q-phase" indicating that the Q-phase is a bose condensate of spin excitons.

5 pages, 4 figures

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• Spin resonance in the d-wave superconductor CeCoIn5
• Magnetically driven superconductivity in CeCu2Si2
• Feedback spin resonance in superconducting CeCu${}_2$Si${}_2$ and CeCoIn${}_5$
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• The effect of the pseudogap on suppressing high energy inelastic neutron scattering in superconducting YBa2Cu3O6.5
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• The resonance peak in the electron-doped cuprate superconductors
• Exploring the fragile antiferromagnetic superconducting phase in CeCoIn5
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• Fermi surface evolution through a heavy fermion superconductor-to-antiferromagnet transition: de Haas-van Alphen effect in Cd-substituted CeCoIn${}_5$

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• Single to multi quasiparticle excitations in the itinerant helical magnet CeRhIn${}_5$
• Strong coupling theory of heavy fermion criticality II
• Nature of the spin resonance mode in CeCoIn${}_5$
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• Spin Resonance and Magnetic Order in an Unconventional Superconductor
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• Impurity-induced antiferromagnetic order in Pauli-limited nodal superconductors: application to heavy fermion CeCoIn5
• Anomalous change in the de Haas-van Alphen oscillations of CeCoIn${}_5$ at ultra-low temperatures
• Competing magnetic orders in the superconducting state of Nd-doped CeRhIn${}_5$ under pressure
• Relaxing Kondo screened Kramers-doublets in CeRhSi${}_3$
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• Anisotropic effect of a magnetic field on the neutron spin resonance in FeSe
• Thermal Expansion of the Heavy-fermion Superconductor PuCoGa${}_5$
• Quantum critical quasiparticle scattering within the superconducting state of CeCoIn5
• Collective spin resonance excitation in the gapped itinerant multipole hidden order phase of URu2Si2
• Switching dynamics of the spin density wave in superconducting CeCoIn5
• Impurity-induced magnetic droplet in unconventional superconductors near magnetic instability: Application to Nd doped $\mathbf{CeCoI}{\mathbf{n}}_5$
• Anisotropic excitonic magnetism from discrete ${\mathrm{C}}_4$ symmetry in CeRhIn${}_5$
• Ground and Applied-Field-Driven Magnetic States of Antiferromagnets
• Distinct domain switching in Nd0.05Ce0.95CoIn5 at low and high fields
• Magnetic field tuned superconducting and normal phase magnetism in CeCo${}_{0.5}$Rh${}_{0.5}$In${}_5$