This article gives an overview of both theoretical and experimental developments
concerning states with lattice symmetry breaking in the cuprate high-temperature …

Although copper oxide high-temperature superconductors constitute a complex and diverse
material family, they all share a layered lattice structure. This curious fact prompts the …

Besides superconductivity, copper-oxide high-temperature superconductors are susceptible
to other types of ordering. We used scanning tunneling microscopy and resonant elastic x …

The iron-based high temperature superconductors share a number of similarities with their
copper-based counterparts, such as reduced dimensionality, proximity to states of …

The superconducting state is characterized by a pairing of electrons with a superconducting
gap on the Fermi surface. In iron-based superconductors, an unconventional pairing state …

Despite much theoretical effort, there is no complete theory of the “strange” metal state of the
high temperature superconductors, and its linear-in-temperature T resistivity. Recent …

The Cooper pairing mechanism of heavy fermionsuperconductors,,,, long thought to be due
to spin fluctuations,,, has not yet been determined. It is the momentum space (k-space) …

The antiferromagnetic ground state of copper oxide Mott insulators is achieved by localizing
an electron at each copper atom in real space (r-space). Removing a small fraction of these …

Doped Mott insulators have a strong propensity to form patterns of holes and spins often
referred to as stripes,,,,. In copper oxides, doping also gives rise to the pseudogap state …

In the first three years since the discovery of Fe-based high T c superconductors, scanning
tunneling microscopy (STM) and spectroscopy have shed light on three important questions …