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 …

Since the discovery of high T c iron-based superconductors in early 2008, more than 15,000
papers have been published as a result of intensive research. This paper describes the …

Recently, the discovery of superconductivity with a critical temperature T c up to 80 K in
Ruddlesden–Popper phases La n+ 1 Ni n O 3 n+ 1 (n= 2) under pressure has garnered …

Following the discovery of long-range antiferromagnetic order in the parent compounds of
high-transition-temperature (high-T c) copper oxides,, there have been efforts to understand …

Here we report bulk superconductivity in BaFe 1.8 Co 0.2 As 2 single crystals below T c= 22
K, as demonstrated by resistivity, magnetic susceptibility, and specific heat data. Hall data …

This review shows the highlights of a 4-year-long research project supported by the
Japanese Government to explore new superconducting materials and relevant functional …