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TT: Fachverband Tiefe Temperaturen
TT 23: Nonequilibrium Quantum Many-Body Systems 1 (joint session TT/DY)
TT 23.8: Vortrag
Dienstag, 17. März 2020, 11:30–11:45, HSZ 204
η–paired hidden phase in photodoped Mott insulators — •Jiajun Li1, Denis Golez2, Philipp Werner3, and Martin Eckstein1 — 1University of Erlangen-Nuremberg, Germany — 2Flatiron Institute, New York, US — 3University of Fribourg, Switzerland
We show that a metastable η–pairing superconducting phase can be induced by photodoping doublons and holes into a strongly repulsive fermionic Hubbard model. The doublon-hole condensate extends over a wide range of doublon densities and effective temperatures. Different non-equilibrium protocols to realize this state are proposed and numerically tested. We also study the optical conductivity in the superconducting phase, which exhibits ideal metallic behavior, i.e., a delta function at zero-frequency in the conductivity, in conjunction with negative conductivity at large frequencies. These characteristic optical properties can provide a fingerprint of the η-pairing phase in pump-probe experiments.