Seminar: New mechanisms and materials for odd-frequency superconductivity

  • Date:
  • Location: Ångströmlaboratoriet, Lägerhyddsvägen 1 Polhem (Å10134)
  • Lecturer: Annica Black-Schaffer
  • Contact person: Annica Black-Schaffer
  • Seminarium

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 of the electrons, 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 known bulk superconductors, ranging from doped topological insulators and multiband superconductors, such as Sr2RuO4 and UPt3, to light-driven conventional superconductors. In this talk I will provide a brief introduction to odd-frequency superconductivity followed by a review of a few systems and materials where odd-frequency superconductivity is important for our understanding of the superconducting state.