Charge dynamics in doped triangular antiferromagnets

Details Charge dynamics in doped triangular antiferromagnets Charge dynamics in doped triangular antiferromagnets

2000-04-10

arxiv.org/abs/cond-mat/0004130v1

Phys. Rev. B 61, 7409 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.61.7409

Within the framework of the fermion-spin theory based on the charge-spin separation, the charge dynamics of the doped antiferromagnet on a triangular lattice is studied. The holon part is treated by using the loop expansion to the second order. It is shown that the charge dynamics is mainly caused by charged holons moving in the background of spinon excitations. The optical conductivity spectrum shows an unusual behavior at low energies and an anomalous midinfrared band, while the resistivity exhibits a nonlinearity in temperatures.

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