Pseudogap effects on the charge dynamics in the underdoped copper oxide materials

TL;DR

This paper investigates how the pseudogap influences charge transport in underdoped copper oxides using the t-J model, revealing temperature-dependent behaviors linked to in-plane and c-axis resistivity changes.

Contribution

It introduces a fermion-spin theory approach within the t-J model to explain charge dynamics affected by the pseudogap in underdoped cuprates.

Findings

Pseudogap suppresses in-plane charge fluctuation scattering at low temperatures.

In-plane resistivity transitions from linear to nonlinear with decreasing temperature.

C-axis resistivity exhibits a crossover to semiconducting-like behavior.

Abstract

Within the t-J model, the charge dynamics of copper oxide materials in the underdoped regime is studied based on the fermion-spin theory. It is shown that both in-plane charge dynamics and c-axis charge dynamics are mainly governed by the scattering from the in-plane fluctuation, which would be suppressed when the holon pseudogap opens at low temperatures, leading to the temperature linear to the nonlinear range in the in-plane resistivity and crossovers to the semiconducting-like range in the c-axis resistivity.