Doping dependence of charge dynamics in electron-doped cuprates

Details Doping dependence of charge dynamics in electron-doped cuprates Doping dependence of charge dynamics in electron-doped cuprates

2004-04-20

arxiv.org/abs/cond-mat/0404467v2

Phys. Lett. A 337, 61(2005)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures, discussions are added, accepted for publication in Phys. Lett. A

Scientific paper

10.1016/j.physleta.2005.01.052

Within the t-t'-J model, the doping dependence of charge dynamics in electron-doped cuprates is studied. The conductivity spectrum shows a pseudogap structure with a low-energy peak appearing at $\omega\sim 0$ and an rather sharp midinfrared peak appearing around $\omega\sim 0.3\mid t\mid$, and the resistivity exhibits a crossover from the high temperature metallic-like to low temperature insulating-like behavior in the relatively low doped regime, and a metallic-like behavior in the relatively high doped regime, in qualitative agreement with experiments. Our results also show that these unusual behaviors of the charge dynamics is intriguingly related to the magnetic correlation in the system.

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