'Conventional'superconductivity, as used in this review, refers to electron–phonon-coupled
superconducting electron pairs described by BCS theory. Unconventional superconductivity …

This Colloquium reviews the 25 year quest to understand the continuous (second-order),
mean-field-like phase transition occurring at 17.5 K in URu 2 Si 2. About ten years ago, the …

The cross section for X-ray resonant exchange scattering is reformulated in terms of linear
polarization states perpendicular and parallel to the scattering plane, a basis particularly …

This topical review describes the multitude of unconventional behaviors in the hidden order,
heavy fermion, antiferromagnetic and superconducting phases of the intermetallic …

Antiferromagnetic order and fluctuations in the heavy-fermion superconductor URu 2 Si 2
have been studied by magnetic neutron scattering. Below TN= 17.5 K, URu 2 Si 2 is a type-I …

Research on actinide materials, both basic and applied, has been greatly advanced by the
general techniques available from high-intensity photon beams from x-ray synchrotron …

We propose a model based on quadrupolar ordering of localized f electrons to explain the
17.5 K phase transition of U Ru 2 Si 2. The tiny staggered magnetic moment observed by …

Recent experimental and theoretical interest in the superconducting phase of the heavy-
fermion material URu 2 Si 2 has led to a number of proposals in which the superconducting …

We have performed elastic neutron-scattering experiments on the heavy-electron compound
URu 2 Si 2 for pressure P up to 2.8 GPa. We have found that the antiferromagnetic (100) …

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 …