The heavy-fermion metal CeCu 2 Si 2 was the first discovered unconventional, non-phonon-
mediated superconductor and, for a long time, was believed to exhibit single-band d-wave …

The origin of unconventional superconductivity, including high-temperature and heavy-
fermion superconductivity, is still a matter of controversy. Spin excitations instead of phonons …

Symmetry breaking beyond a global U (1) phase is the key signature of unconventional
superconductors. As prototypical strongly correlated materials, heavy-fermion metals …

Superconductivity in the heavy-fermion compound CeCu 2 Si 2 is a prototypical example of
Cooper pairs formed by strongly correlated electrons. For more than 30 years, it has been …

Neutron scattering measurements of the magnetic excitations in single crystals of
antiferromagnetic CaFe 2 As 2 reveal steeply dispersive and well-defined spin waves up to …

To identify the superconducting gap symmetry in CeCoIn 5 (T c= 2.3 K), we measured the
angle-resolved specific heat (C ϕ) in a field rotated around the c axis down to a very low …

The superconducting order parameter of the first heavy-fermion superconductor CeCu 2 Si 2
is currently under debate. A key ingredient to understand its superconductivity and physical …

Heavy fermions have served as prototype examples of strongly-correlated electron systems.
The occurrence of unconventional superconductivity in close proximity to the electronic …

We investigate the spin dynamics in the superconducting phase of UTe2 by triple-axis
inelastic neutron scattering on a single crystal. At the wave-vector, where the normal state …

We have studied the magnetic order inside the superconducting phase of CeCoIn 5 for fields
along the [1 0 0] crystallographic direction using neutron diffraction. We find a spin-density …