An overview of quantum phase transitions (QPTs) in metallic ferromagnets, discussing both
experimental and theoretical aspects, is given. These QPTs can be classified with respect to …

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

Strange metal behavior is ubiquitous in correlated materials, ranging from cuprate
superconductors to bilayer graphene, and may arise from physics beyond the quantum …

Heavy-fermion metals exhibit a plethora of low-temperature ordering phenomena,,,. Among
these are the so-called hidden-order phases,,,, that, in contrast to conventional magnetic …

We present a theory of the scaling behavior of the thermodynamic, transport, and dynamical
properties of a three-dimensional metal at an antiferromagnetic (AFM) critical point. We …

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 …

Investigating solids with light gives direct access to charge dynamics, electronic and
magnetic excitations. For heavy fermions, one has to adjust the frequency of the probing …

The nature of the antiferromagnetic order in the heavy fermion metal YbRh 2 Si 2, its
quantum criticality, and superconductivity, which appears at low mK temperatures, remain …

A framework is presented for modeling and understanding magnetic excitations in localized,
intermediate coupling magnets where the interplay between spin-orbit coupling, magnetic …

The antiferromagnetic mixed valence ternary oxide α-CoV 3 O 8 displays disorder on the Co
2+ site that is inherent to the I bam space group resulting in a local selection rule requiring …