Abstract
Within the framework of the fermion-spin theory, the normal state transport property of copper oxide materials in the underdoped regime is studied based on the t-J model. It is shown that there is a common relaxation mechanism for the in-plane and c-axis transport, i.e., the in-plane and c-axis transport properties 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.
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