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.
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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
URL URL not found
Keywords
cuprates electron–phonon coupling insulator–metal transition ultrafast optics

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