SPICE Workshop on Hybrid Correlated States and Dynamics in Quantum Materials, May 14th - 16th 2024
Annica Black-Schaffer
Odd-frequency superconductivity is a remarkable superconducting phase appearing when electrons pair at unequal times, with the pair amplitude being odd under the exchange of the time coordinates, or equivalently, odd in frequency. Since odd-frequency pairing vanish at equal times it is, in contrast to conventional superconductivity, intrinsically non-local in time and represent a truly dynamical effect. Odd-frequency superconductivity has been realized to be the key to understand the surprising physics of superconductor-ferromagnet (SF) hybrid structures and has also enabled the emerging field of superconducting spintronics. More recently, we have identified odd-frequency superconductivity also in many other systems, ranging from doped topological insulators and multiorbital superconductors, including Sr2RuO4 and UPt3, to light-driven conventional superconductors, as well as due to non-Hermitian effects in superconductor hybrid structures. In this talk I will give an introduction to odd-frequency superconductivity followed by a review of a few systems and materials where odd-frequency superconductivity has recently proven to be important for our understanding of the superconducting state