In the last two decades non-equilibrium spectroscopies have evolved from avant-garde
studies to crucial tools for expanding our understanding of the physics of strongly correlated …

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 …

Explicit and implicit experimental evidence for charge density wave (CDW) presence in high‐
Tc superconducting oxides is analyzed. The theory of CDW superconductors is presented. It …

Using time-domain terahertz spectroscopy we performed direct studies of the photoinduced
suppres<? format?> sion and recovery of the superconducting gap in a conventional BCS …

Single-layer FeSe films grown on the SrTiO3 substrate (FeSe/STO) have attracted much
attention because of their possible record-high superconducting critical temperature (T c) …

Superconductors are classified by their pairing mechanism and the coupling strength,
measured as the ratio of the energy gap, 2 Δ, to the critical temperature, T c. We present an …

Distinctive superconducting behaviors between bulk and monolayer FeSe make it
challenging to obtain a unified picture of all FeSe-based superconductors. We investigate …

The nature of the pseudogap (PG) in high transition temperature (high T c) superconducting
cuprates has been a major issue in condensed matter physics. It is still unclear whether the …

We report measurements of quasiparticle relaxation dynamics in the high-temperature
superconductor (Ba, K) Fe 2 As 2 in optimally doped, underdoped, and undoped regimes. In …

Many of the iron pnictides have strongly anisotropic normal-state characteristics, important
for the exotic magnetic and superconducting behaviour these materials exhibit. Yet, the …