Strongly correlated systems present fundamental challenges, especially in materials in
which electronic correlations cause a strong increase of the effective mass of the charge …

Over the past 35 years, research on unconventional superconductivity in heavy-fermion
systems has evolved from the surprising observations of unprecedented superconducting …

Fermi liquid theory, the standard theory of metals, has been challenged by a number of
observations of anomalous metallic behavior found in the vicinity of a quantum phase …

It is shown that unconventional critical phenomena commonly observed in paramagnetic
metals YbRh 2 Si 2, YbRh 2 (Si 0.95 Ge 0.05) 2, and β-YbAlB 4 are naturally explained by …

The roles of critical valence fluctuations of Ce and Yb are discussed as a key origin of
several anomalies observed in Ce-and Yb-based heavy fermion systems. Recent …

Strongly correlated electron systems at the border of magnetism are of active current
interest, particularly because the accompanying quantum criticality provides a route towards …

A fundamental challenge to our current understanding of metals is the observation of
qualitative departures from Fermi liquid behavior. The standard view attributes such non …

We present a comprehensive study of the inhomogeneous mixed-valence compound,
EuPd3S4, by electrical transport, X-ray diffraction, time-domain 151Eu synchrotron …

We propose a model for the intrinsic quantum criticality of β-YbAlB 4, in which a vortex in
momentum space gives rise to a new type of Fermi surface singularity. The unquenched …

Superconductors is neither about basic aspects of superconductivity nor about its
applications, but its mainstay is superconducting materials. Unusual and unconventional …