2003/11/30 by Bin Liu, Ying Liang, Shiping Feng +1
Materials Science · Physics and Astronomy · #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.69.224506
published as Phys. Rev. B 69, 224506 (2004) · 5 pages, 3 figures, typo corrected
openalex publication_date 2004/06/18 · arxiv created 2004/06/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The charge transport of electron-doped Mott insulators on a triangular lattice is investigated within the t\text\ensuremath-J model. The conductivity spectrum shows a low-energy peak and an unusual midinfrared band, while the resistivity is characterized by a crossover from the high temperature metalliclike behavior to low temperature insulatinglike behavior, in qualitative agreement with experiments. Our results also show that the mechanism that causes this unusual charge transport is closely related to a competition between the kinetic energy and the magnetic energy in the system.