c-axis Optical Conductivity in Cuprates

Details c-axis Optical Conductivity in Cuprates c-axis Optical Conductivity in Cuprates

1999-06-22

arxiv.org/abs/cond-mat/9906333v1

Physica B, 484-288 (2000) 1386

Physics

Condensed Matter

Strongly Correlated Electrons

LT22 - submitted to Physica B

Scientific paper

10.1016/S0921-4526(99)02537-5

We investigate the c-axis optical conductivity and d.c. resistivity of cuprate superconductors in the normal state. Assuming that the interlayer hopping is incoherent we express the conductivity with planar spectral functions obtained (i) from angle-resolved photoemission experiments, (ii) using marginal Fermi liquid ansatz, and (iii) with the finite-temperature Lanczos method for finite two-dimensional systems described by the t-J model. Here in the low doping regime a pseudo-gap opening in the density of states appears to be responsible for a semimetallic-like behavior of the D.C. resistivity. In the optimally doped regime we find an anomalous relaxation rate. Analytically this result is reproduced with the use of the marginal Fermi liquid ansatz for the self energy with parameters obtained from the exact diagonalization results.

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