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 …

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

Spin-triplet superconductors are of extensive current interest because they can host
topological state and Majorana fermions important for quantum computation. The uranium …

In this paper we review experimental and theoretical results on higher electronic multipoles
in solids with strong correlations. Recent experiments and their theoretical interpretation …

Complex electronic matter shows subtle forms of self-organization, which are almost
invisible to the available experimental tools. One prominent example is provided by the …

Heavy electronic states originating from the f atomic orbitals underlie a rich variety of
quantum phases of matter. We use atomic scale imaging and spectroscopy with the …

The development of collective long-range order by means of phase transitions occurs by the
spontaneous breaking of fundamental symmetries. Magnetism is a consequence of broken …

Spontaneous, collective ordering of electronic degrees of freedom leads to second-order
phase transitions that are characterized by an order parameter driving the transition. The …

Shubnikov–de Haas measurements of high quality URu 2 Si 2 single crystals reveal two
previously unobserved Fermi surface branches in the so-called hidden order phase …

Solids with strong electron correlations generally develop exotic phases of electron matter at
low temperatures,,. Among such systems, the heavy-fermion semimetal URu2Si2 exhibits an …