Evolution of the spin resonance in CeCoIn$_5$ under magnetic field

Authors :: Panarin, J.
Raymond, S.
Lapertot, G.
Flouquet, J.
Source :: J. Phys. Soc. Japan, 78 (2009) 113706
Publication Year :: 2009
Abstract: 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.<br />Comment: 4 pages, 4 figures, submitted to J. Phys. Soc. Japan