Charge dynamics in doped triangular antiferromagnets

Abstract

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.

References in corpus (7)

• Long range Neel order in the triangular Heisenberg model
• Similarities between organic and cuprate superconductors
• Indications of Unconventional Superconductivity in Doped and Undoped Triangular Antiferromagnets
• Theory of Photoemission from the Copper Oxide Material
• Charge Dynamics from Copper Oxide Materials
• Estimation of the Doping Dependence of Antiferromagnetism in the Copper Oxide Material
• Spin-Liquid State for Two-Dimensional Heisenberg Antiferromagnets on a Triangular Lattice

Cited by in corpus (2)

• Charge transport of electron doped Mott insulators on a triangular lattice
• Effect of frustration on charge dynamics for a doped two-dimensional triangular Hubbard lattice: Comparison with a square lattice