Charge transport of electron doped Mott insulators on a triangular lattice

Details Charge transport of electron doped Mott insulators on a triangular lattice Charge transport of electron doped Mott insulators on a triangular lattice

2003-11-25

arxiv.org/abs/cond-mat/0311557v3

Phys. Rev. B 69, 224506 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures, typo corrected

Scientific paper

10.1103/PhysRevB.69.224506

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.

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