2014/03/07 by Xianhui Chen, Pengcheng Dai, Donglai Feng +2 · 1 citation
Physics and Astronomy · #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1093/nsr/nwu007
published as National Science Review 1 (3), 371- 395 (2014)
arxiv created 2014/03/07 · arxiv updated 2014/12/02
In a superconductor electrons form pairs and electric transport becomes dissipation-less at low temperatures. Recently discovered iron based superconductors have the highest superconducting transition temperature next to copper oxides. In this article, we review material aspects and physical properties of iron based superconductors. We discuss the dependence of transition temperature on the crystal structure, the interplay between antiferromagnetism and superconductivity by examining neutron scattering experiments, and the electronic properties of these compounds obtained by angle resolved photoemission spectroscopy in link with some results from scanning tunneling microscopy/spectroscopy measurements. Possible microscopic model for this class of compounds is discussed from a strong coupling point of view.