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Evolution of the spin resonance in CeCoIn₅ under magnetic field

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arxiv 0908.2688 v1 pith:RNCJCR4F submitted 2009-08-19 cond-mat.str-el cond-mat.supr-con

Evolution of the spin resonance in CeCoIn₅ under magnetic field

classification cond-mat.str-el cond-mat.supr-con
keywords magneticfieldcecoincharacteristicevolutionresonancespinapplied
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The evolution of the magnetic excitation spectrum of the unconventional superconductor CeCoIn$_{5}$ was studied by inelastic neutron scattering as a function of magnetic field applied in the [1, -1, 0] direction. The spin resonance characteristic of the superconducting states was observed up to about $H_{c2}$/2 : it is still centered at (1/2, 1/2, 1/2) when the magnetic field increases while its characteristic energy decreases and its lineshape substantially broadens.

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