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Report No.

Evidence for three fluctuation channels in the spin resonance of the unconventional superconductor CeCoIn$$_5$$

Raymond, S.*; Kaneko, Koji   ; Hiess, A.*; Steffens, P.*; Lapertot, G.*

Polarized inelastic neutron scattering under magnetic field is used to get a microscopic insight into the spin resonance of the heavy fermion superconductor CeCoIn$$_5$$. The resonance lineshape is found to depend on the neutron polarization: Some of the spectral weight is common to the two polarization channels while the remaining part is distributed equally between them. This is evidence for the spin resonance being a degenerate mode with three fluctuation channels: A Zeeman split contribution and an additional longitudinal mode.



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Category:Physics, Multidisciplinary



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