Topological Superconductivity and Unconventional pairing in Oxide Interfaces - a podcast by Michael Haack

To pinpoint the microscopic mechanism for superconductivity has
proven to be one of the most outstanding challenges in the physics ofcorrelated quantum matter. Thus far, the most direct evidence for
an electronic pairing mechanism is the observation of a new symmetryof the order-parameter, as done in the cuprate high-temperature
superconductors. Like distinctions based on the symmetry of a locallydefi�ned order-parameter, global, topological invariants allow for
a sharp discrimination between states of matter that cannot be transformedinto each other adiabatically. Here we propose an unconventional
pairing state for the electronuid in two-dimensional oxide
interfaces and establish a direct link to the emergence of nontrivialtopological invariants. Topological superconductivity and Majorana edge states can then be used to detect the microscopic origin for
superconductivity. In addition, we show that also the density wavestates that compete with superconductivity sensitively depend on the
nature of the pairing interaction. Our conclusion is based on the specialrole played by the spin-orbit coupling and the shape of the Fermi
surface in SrTiO3/LaAlO3-interfaces and closely related systems.

Further episodes of Sommerfeld Theory Colloquium (ASC)

Further podcasts by Michael Haack

Website of Michael Haack