2010/02/28 by S. Moukouri, Eitan Eidelstein, E. Eidelstein
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Density matrix renormalization group #Electron #Group (periodic table) #Luttinger liquid #Magnetic and transport properties of perovskites and related materials #Materials science #Mathematical physics #Matrix (chemical analysis) #Physics #Physics of Superconductivity and Magnetism #Quantum electrodynamics #Quantum mechanics #Renormalization group #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.82.165132
7 pages, 10 figures
arxiv created 2010/09/03 · openalex publication_date 2010/10/29 · arxiv updated 2015/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report a two-step density-matrix renormalization-group computation of the equal-time single-particle Green's function, the density-density correlations, and the low-frequency spectral weight function of a spinless fermion model in an anisotropic two-dimensional lattice at half filling. We find that at weak couplings the density-density correlations have the universal decay of a Fermi liquid; the spectral weight function displays a sharp quasiparticle peak. But in the vicinity of a quantum critical point, these correlations strongly deviate from a Fermi-liquid prediction and a pseudogap opens in the spectral weight function.