Superconductivity is a remarkably widespread phenomenon that is observed in most metals
cooled to very low temperatures. The ubiquity of such conventional superconductors, and …

Emergent electronic phenomena in iron-based superconductors have been at the forefront
of condensed matter physics for more than a decade. Much has been learned about the …

Abstract The BCS-BEC (Bardeen-Cooper-Schrieffer–Bose-Einstein-condensate) crossover
from strongly overlap** Cooper pairs to non-overlap** composite bosons in the strong …

High-temperature superconductivity and a wide variety of exotic superconducting states
discovered in FeSe-based materials have been at the frontier of research on condensed …

The interplay among magnetism, electronic nematicity, and superconductivity is the key
issue in strongly correlated materials including iron-based, cuprate, and heavy-fermion …

When a symmetry-breaking phase of matter is suppressed to a quantum critical point (QCP)
at absolute zero, quantum-mechanical fluctuations proliferate. Such fluctuations can lead to …

The quantum vortex liquid (QVL) is an intriguing state of type-II superconductors in which
intense quantum fluctuations of the superconducting (SC) order parameter destroy the …

Isoelectronic substitution is an ideal tuning parameter to alter electronic states and
correlations in iron-based superconductors. As this substitution takes place outside the …

The interplay of different electronic phases underlies the physics of unconventional
superconductors. One of the most intriguing examples is a high-temperature …

Strain is a powerful experimental tool to explore new electronic states and understand
unconventional superconductivity. Here, we investigate the effect of uniaxial strain on the …