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

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

2009-08-19

arxiv.org/abs/0908.2688v1

J. Phys. Soc. Japan, 78 (2009) 113706

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, submitted to J. Phys. Soc. Japan

Scientific paper

10.1143/JPSJ.78.113706

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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