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TT: Fachverband Tiefe Temperaturen

TT 10: Correlated Electrons: (General) Theory 1

TT 10.11: Vortrag

Montag, 26. März 2012, 17:45–18:00, H 3010

Superconductivity and the Pseudogap in the 2d Hubbard model — •Emanuel Gull¹, Olivier Parcollet², and Andrew J. Millis¹ — ¹Columbia University, New York, NY — ²Institut de Physique Théorique (IPhT), CEA, France

Using a numerically exact continuous-time quantum Monte Carlo impurity solver and the DCA cluster dynamical mean field method with cluster sizes up to 16, we have been able to access the superconducting phase of the two dimensional Hubbard model for parameters believed to be relevant to high temperature copper oxide superconductivity. We present results for the phase diagram, the gap to transition temperature ratio, and the interplay of the pseudogap and the superconducting gap. The gap results are obtained by direct inference from imaginary frequency data and analytically continued spectral functions.