2002/04/02 by Carsten Honerkamp, C. Honerkamp, Manfred Salmhofer +2 · 57 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Fermi surface #Hubbard model #Iron-based superconductors research #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Renormalization group #Spin density wave #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1140/epjb/e20020137
published in The European Physical Journal B 27(1), 127-134 (Springer Science+Business Media) · 8 pages, to appear in European Physical Journal B
arxiv created 2002/04/02 · openalex publication_date 2002/05/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We extend the analysis of the renormalization group flow in the two-dimensional Hubbard model close to half-filling using the recently developed temperature flow formalism. We investigate the interplay of d-density wave and Fermi surface deformation tendencies with those towards d-wave pairing and antiferromagnetism. For a ratio of next nearest to nearest neighbor hoppings, t'/t=-0.25, and band fillings where the Fermi surface is inside the Umklapp surface, only the d-pairing susceptibility diverges at low temperatures. When the Fermi surface intersects the Umklapp surface close to the saddle points, d-wave pairing, d-density wave, antiferromagnetic and, to a weaker extent, d-wave Fermi surface deformation susceptibilities grow together when the interactions flow to strong coupling. We interpret these findings as indications for a non-trivial strongly coupled phase with short-ranged superconducting and antiferromagnetic correlations, in close analogy with the spin liquid ground state in the well-understood two-leg Hubbard ladder.