Iron-based superconductors: teenage, complex, challenging

Abstract

The advent of iron-based superconductors in 2008 came as a complete surprise to the condensed matter community. Now 15 years later, they are beginning to impart some of their new-found wisdom on a slew of emerging superconductors that boast similar traits.

arXiv commentArticle invited by Physics Today and intended for general readers. 18 pages, 4+2 figures. Version submitted, with the number of references limited by editorial mandate. The published version has been edited

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• Nematic spin correlations pervading the phase diagram of FeSe${}_{1-x}$S${}_x$
• Orbital-selective electron correlations in high-$T_{\mathrm{c}}$ bilayer nickelates: from a global phase diagram to implications for spectroscopy
• Origin of misleading convergence in self-consistent many-electron theories: Fundamental aspects and practical implications
• Superconductor-Insulator transition in a two-orbital attractive Hubbard model with Hund's exchange
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