Superconducting Phase and Pairing Fluctuations in the Half-Filled Two-Dimensional Hubbard Model

2011/02/28 by Michael A. Sentef, Michael Sentef, Philipp Werner +3 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cuprate #Hubbard model #Iron-based superconductors research #Monte Carlo method #Pairing #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum Monte Carlo #Quantum mechanics #Scattering #Scattering rate #Superconductivity #cond-mat.str-el #cond-mat.supr-con #physics.comp-ph

paper · pdf · doi:10.1103/physrevlett.107.126401

published as Phys. Rev. Lett. 107, 126401 (2011) · 4.3 pages, 4 figures

openalex publication_date 2011/09/14 · arxiv created 2011/09/26 · arxiv updated 2011/09/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Competition betweend-wave superconductivity and antiferromagnetism in the two-dimensional Hubbard model
• Local order and the gapped phase of the Hubbard model: A plaquette dynamical mean-field investigation
• Hubbard model at infinite dimensions: Thermodynamic and transport properties
• Pseudogap opening and formation of Fermi arcs as an orbital-selective Mott transition in momentum space
• Pairing and superconductivity from weak to strong coupling in the attractive Hubbard model
• Renormalized mean-field analysis of antiferromagnetism andd-wave superconductivity in the two-dimensional Hubbard model
• Cluster Dynamical Mean Field Theory of the Mott Transition
• First-Order Pairing Transition and Single-Particle Spectral Function in the Attractive Hubbard Model
• Pseudogap at hot spots in the two-dimensional Hubbard model at weak coupling
• Ordering, metastability and phase transitions in two-dimensional systems
• Loss of nodal quasiparticle integrity in underdoped YBa2Cu3O6+x
• Metal-to-Insulator Crossover in the Low-Temperature Normal State ofBi2Sr2−xLaxCuO6+δ

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