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 …

Doped SrTiO 3, one of the most dilute bulk systems to display superconductivity, is perhaps
the first example of an unconventional superconductor, as it does not fit into the standard …

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

We argue that the newly discovered superconductivity in a nearly magnetic, Fe-based
layered compound is unconventional and mediated by antiferromagnetic spin fluctuations …

Quasiclassic Usadel equations for two-band superconductors in the dirty limit are derived
with the account of both intraband and interband scattering by nonmagnetic impurities. From …

We analyze antiferromagnetism and superconductivity in novel Fe-based superconductors
within the itinerant model of small electron and hole pockets near (0, 0) and (π, π). We argue …

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 …

We present detailed measurements of the longitudinal resistivity ρ xx (T, H) and the upper
critical field H c 2 of NdFeAsO 0.7 F 0.3 single crystals in strong dc and pulsed magnetic …

The study of the anisotropic superconductor M g B 2 using a combination of scanning
tunneling microscopy and spectroscopy reveals two distinct energy gaps at Δ 1= 2.3 me V …

Point-contact spectroscopy was originally developed for the determination of the electron–
phonon spectral function in normal metals. However, in the past 20 years it has become an …