2011/10/31 by Kazuyoshi Yoshimi, Takeo Kato, Hideaki Maebashi
Materials Science · Physics and Astronomy · #Anisotropy #Charge (physics) #Charge density wave #Charge ordering #Condensed matter physics #Deformation (meteorology) #Fermi Gamma-ray Space Telescope #Fermi surface #Hubbard model #Organic and Molecular Conductors Research #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Rare-earth and actinide compounds #Superconductivity #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1143/jpsj.80.123707
published as J. Phys. Soc. Jpn. 80, 123707 (2011) · 4 pages, 5 figures
arxiv created 2011/11/24 · arxiv updated 2011/11/28 · openalex publication_date 2011/12/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the deformation of a Fermi surface (FS) near charge-ordering (CO) transition. By applying a fluctuation-exchange approximation to the two-dimensional extended Hubbard model, we show that the FS is largely modified by strong charge fluctuations when the wave number of the CO pattern does not match the nesting vector of the FS in a noninteracting system. We also discuss the enhanced anisotropy in quasiparticle properties in the resultant metallic state.