Superconductivity: Exotic Commonalities in Phase and Mode
arXiv:0903.2758 · doi:10.1038/nmat2415
Abstract
Recent muon and neutron experiments on the new FeAs-based superconductors revealed phase diagrams characterized by first-order evolution from antiferromagnetic to superconducting states, and an inelastic magnetic resonance mode whose energy scales as $\sim 4 k_{B}T_{c}$. These features exhibit striking commonalities with cuprate, backyball, organic, and heavy-fermion superconductors as well as superfluid $^{4}$He.
4 pages, 2 figures, original version of News and Views for Nature Materials submitted on Feb. 8, 2009; revised version will appear as Nature Materials 8 (April, 2009) 253-255