2006/09/30 by J. Kokalj, P. Prelovšek, P. Prelovsek · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.75.045111
published as Phys. Rev. B 75, 045111 (2007) · 4 pages, 1 figure
arxiv created 2006/11/28 · openalex publication_date 2007/01/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The validity of the Luttinger sum rule is considered for finite systems of interacting electrons, where the Fermi volume is determined by location of zeros of Green's function. It is shown that the sum rule in the paramagnetic state is evidently violated within the planar t\text\ensuremath-J model at low doping while for the related Hubbard model, even in the presence of next-nearest-neighbor hopping, no clear-cut exception is found.