Kamihara and coworkers' report of superconductivity at T c= 26 K in fluorine-doped
LaFeAsO inspired a worldwide effort to understand the nature of the superconductivity in this …

Two-band superconductivity has become an important topic over the past ten years.
Extensive experimental and theoretical studies started with MgB 2 and are now focused on …

The recently discovered Fe-pnictide and chalcogenide superconductors display low-
temperature properties suggesting superconducting gap structures which appear to vary …

We have investigated the specific heat of optimally doped iron chalcogenide superconductor
Fe (Te 0. 57 Se 0. 43) with a high-quality single crystal sample. The electronic specific heat …

We present a comprehensive study of the low-temperature heat capacity and thermal
expansion of single crystals of the hole-doped Ba 1− x K x Fe 2 As 2 series (0< x< 1) and the …

Although the pairing mechanism of Fe-based superconductors (FeSCs) has not yet been
settled with consensus with regard to the pairing symmetry and the superconducting (SC) …

The Leggett mode associated with out-of-phase oscillations of the superconducting phase in
multiband superconductors usually is heavy due to interband coupling, which makes its …

Superconductors are excellent testbeds for studying vortices, topological excitations that
also appear in superfluids, liquid crystals and Bose–Einstein condensates. Vortex motion …

We measure the penetration depth λ ab (T) in Ba (Fe 1-x Co x) 2 As 2 using local techniques
that do<? format?> not average over the sample. The superfluid density ρ s (T)≡ 1/λ ab (T) 2 …

In this work we analyze the influence of random point defects introduced by 3 MeV proton
irradiation on the critical current density (J c) and vortex dynamics of a Ba (Fe 0.925 Co …