1995/02/03 by Y. M. Vilk, A. -M. S. Tremblay, A.–M. S. Tremblay · 3 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Fermi Gamma-ray Space Telescope #Fermi liquid theory #Hubbard model #Iron-based superconductors research #Monte Carlo method #Paramagnetism #Physics #Physics of Superconductivity and Magnetism #Quantum Monte Carlo #Quantum and electron transport phenomena #Quantum mechanics #Quasiparticle #Superconductivity #Vertex (graph theory) #cond-mat
paper · pdf · doi:10.1209/epl/i1996-00315-2
published as Europhys. Lett. 33, 159-164 (1996) (6 pages). · 5 pages, latex, uuencoded figures, REVTEX Also available by direct request to [email protected]
arxiv created 1995/02/03 · openalex publication_date 1996/01/10 · arxiv updated 2016/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
It is shown that an analytic approach which includes vertex corrections in a paramagnon-like self-energy can quantitatively explain the two-dimensional Hubbard model in the weak-to-intermediate coupling regime. All parameters are determined self-consistently. This approach clearly shows that in two dimensions Fermi-liquid quasiparticles disappear in the finite-temperature paramagnetic state when the antiferromagnetic correlation length becomes larger than the electronic thermal de Broglie wavelength. Quantum Monte Carlo results are used to compare the accuracy of this approach with others.