Charge transport of electron doped Mott insulators on a triangular lattice

Abstract

The charge transport of electron doped Mott insulators on a triangular lattice is investigated within the t-J model based on the partial charge-spin separation fermion-spin theory. The conductivity spectrum shows a low-energy peak and the unusual midinfrared band, while the resistivity is characterized by a crossover from the high temperature metallic-like to the low temperature insulating-like behavior, in qualitative agreement with experiments. Our results also show that the mechanism that cause this unusual charge transport is closely related with a competition between the kinetic energy and magnetic energy in the system.

5 pages, 3 figures, typo corrected

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Cited by in corpus (12)

• Infrared probe of the electronic structure and charge dynamics in Na${}_{0.7}$CoO${}_2$
• Asymmetry of the electron spectrum in hole-doped and electron-doped cuprates
• From Hubbard bands to spin-polaron excitations in the doped Mott material Na${}_x$CoO${}_2$
• Kinetic energy driven superconductivity in the electron doped cobaltate Na${}_x$CoO${}_2\cdot y$H${}_2$O
• Effect of frustration on charge dynamics for a doped two-dimensional triangular Hubbard lattice: Comparison with a square lattice
• The charge asymmetry in superconductivity of hole- and electron-doped cuprates
• Superconductivity in Na${}_x$CoO${}_2\cdot y$H${}_2$O driven by the kinetic energy
• Evolution of electron Fermi surface with doping in cobaltates
• Dynamical spin response of electron doped Mott insulators on a triangular lattice
• Asymmetric doping dependence of superconductivity between hole- and electron-doped triangular-lattice superconductors
• Heat transport of electron-doped Cobaltates
• Superconductivity and magnetic fluctuations in electron-doped cobaltate superconductors