2001/03/31 by Satoshi Fujimoto · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electron #Electronic and Structural Properties of Oxides #Electronic correlation #Fermi liquid theory #Fermion #Hubbard model #Mott insulator #Mott transition #Neutron scattering #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Pyrochlore #Quantum mechanics #Scattering #Strongly correlated material #Superconductivity #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.64.085102
5 pages, 5 figures, revised version accepted for the publication in Phys. Rev. B
arxiv created 2001/05/29 · openalex publication_date 2001/08/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the interplay between geometrical frustration and strong electron correlation based upon the pyrochlore Hubbard model. In the half-filling case, using the perturbative expansion in terms of electron correlation, we show that the self-energy shows a divergent behavior leading the system into the Mott insulating state, in which a quantum disordered spin liquid without magnetic long-range order is realized. In the hole-doped case, we obtain heavy-fermion-like Fermi-liquid state. We also calculate the neutron cross section, which is very consistent with recent neutron scattering experiments for itinerant pyrochlore systems.