Fe-based superconductors: seven years later
  Iron-based superconductors were discovered seven years ago, in 2008. This short review summarizes what we learned about these materials over the last seven years, what are open questions, and what new physics we expect to extract from studies of this new class of high-temperature superconductors. 
Andrey V. Chubukov and P.J. Hirschfeld
cond-mat.supr-con