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 multipole concept, which characterizes the spacial distribution of scalar and vector
objects by their angular dependence, has already become widely used in various areas of …

In superconductors, electrons with spin s= 1/2 form Cooper pairs whose spin structure is
usually singlet (S= 0) or triplet (S= 1). When the electronic structure near the Fermi level is …

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 …

The nature of the pairing symmetry of the first heavy fermion superconductor CeCu2Si2 has
recently become the subject of controversy. While CeCu2Si2 was generally believed to be …

Nuclear magnetic resonance measurements were performed on CeCu 2 Si 2 in the
presence of a magnetic field close to the upper critical field μ 0 H c 2 in order to investigate …

The London penetration depth λ (T) was measured in a single crystal of V 3 Si. The
superfluid density obtained from this measurement shows a distinct signature of two almost …

Recent observations of two nodeless gaps in superconducting CeCu 2 Si 2 have raised
intensive debates on its exact gap symmetry, while a satisfactory theoretical basis is still …

Recent progresses using state-of-the-art experimental techniques have motivated a number
of new insights on heavy fermion physics. This article gives a brief summary of the author's …

The crystal-field ground-state wave function of CeCu 2 Si 2 has been investigated with
linearly polarized M-edge x-ray absorption spectroscopy from 250 mK to 250 K, thus …