Back to the iron age – the physics of Fe-pnictides.

Aula B. Touschek (Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati)

Aula B. Touschek

Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati

Via Enrico Fermi 40 00044 Frascati

I will share with the audience the excitement in condensed-matter community about the discovery of a new class of superconductors – Fe-pnictides, wth Tc reaching almost 60K. The phase diagram of Fe-pnictides is quite similar to that of high-temperature cuprate superconductors, and this fueled early speculations that the physics must be similar. I review recent experiments on three different families of Fe-pnictides, discuss the symmetry of the pairing gap, nodal vs no-nodal gap structure, and theoretical scenarios for the pairing mechanism. I argue that in some respects cuprates and pnictides are quite different, but in others behave as close relatives.

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