Magnetism and superconductivity in the heavy-fermion compound CeCu2Si2 studied by neutron scattering

We report on inelastic neutron scattering experiments on the heavy-fermion superconductor CeCu2Si2 to study the magnetic excitation spectrum in single crystals. Elastic short-range magnetic correlations have been observed in the superconducting state. While the low-energy magnetic response seems to be quasielastic in the normal state above Tc≈600mK, a truly inelastic response is detected in the superconducting state well below TcTc. This inelastic response is discussed in connection to the properties of the superconducting state.