Superconducting phase and pairing fluctuations in the half-filled two-dimensional Hubbard model.

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ID: 101819
2011
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Abstract
The two-dimensional Hubbard model exhibits superconductivity with d-wave symmetry even at half-filling in the presence of a next-nearest neighbor hopping. Using plaquette cluster dynamical mean-field theory with a continuous-time quantum Monte Carlo impurity solver, we reveal the non-Fermi liquid character of the metallic phase in proximity to the superconducting state. Specifically, the low-frequency scattering rate for momenta near (π, 0) varies nonmonotonically at low temperatures, and the dc conductivity is T linear at elevated temperatures with an upturn upon cooling. Evidence is provided that pairing fluctuations dominate the normal-conducting state even considerably above the superconducting transition temperature.
Reference Key
sentef2011superconductingphysical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sentef, Michael;Werner, Philipp;Gull, Emanuel;Kampf, Arno P;
Journal physical review letters
Year 2011
DOI
DOI not found
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Keywords
cuprates electron–phonon coupling insulator–metal transition ultrafast optics

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