In materials with strong local Coulomb interactions, simple defects such as atomic
substitutions strongly affect both macroscopic and local properties of the system. A …

Rare regions, ie, rare large spatial disorder fluctuations, can dramatically change the
properties of a phase transition in a quenched disordered system. In generic classical …

I review theoretical ideas and implications of experiments for the gap structure and symmetry
of the Fe-based superconductors. Unlike any other class of unconventional …

In this paper, we review theoretical and experimental research on rare region effects at
quantum phase transitions in disordered itinerant electron systems. After summarizing a few …

Strange metal behavior is traditionally associated with an underlying putative quantum
critical point at zero temperature. However, in many correlated metals, eg, high-T c cuprate …

Systematic deviations from standard Fermi-liquid behaviour have been widely observed and
documented in several classes of strongly correlated metals. For many of these systems …

Recent work is reviewed on continuous quantum phase transitions in impurity models, both
with fermionic and bosonic baths–these transitions are interesting realizations of boundary …

Impurities, defects, and other types of imperfections are ubiquitous in realistic quantum many-
body systems and essentially unavoidable in solid state materials. Often, such random …

We study the influence of quenched disorder on quantum phase transitions in systems with
overdamped dynamics. For Ising order-parameter symmetry disorder destroys the sharp …

A growing number of superconducting materials display evidence for spontaneous time-
reversal symmetry breaking (TRSB) below their critical transition temperatures. Precisely …