2006/08/31 by Samuel Bieri, Д. А. Иванов, Dmitri Ivanov · 2 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.75.035104
published as Phys. Rev. B 75, 35104 (2007) · 6 pages, 5 figures; x-labels on Figs. 1 and 2 corrected, footnote on particle number corrected, references added
arxiv created 2006/11/01 · openalex publication_date 2007/01/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We analyze the electronic Green's functions in the superconducting ground state of the t\text\ensuremath-J model using Gutzwiller-projected wave functions, and compare them to the conventional BCS form. Some of the properties of the BCS state are preserved by the projection: the total spectral weight is continuous around the quasiparticle node and approximately constant along the Fermi surface. On the other hand, the overall spectral weight is reduced by the projection with a momentum-dependent renormalization, and the projection produces electron-hole asymmetry in renormalization of the electron and hole spectral weights. The latter asymmetry leads to the bending of the effective Fermi surface, which we define as the locus of equal electron and hole spectral weight.