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On the peak in the far-infrared conductivity of strongly anisotropic cuprates

A. Pimenov·A. V. Pronin·A. Loidl·A. Tsukada·M. Naito
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Abstract

We investigate the far-infrared and submillimeter-wave conductivity of electron-doped La_(2-x)Ce_xCuO_4 tilted 1 degree off from the ab-plane. The effective conductivity measured for this tilt angle reveals an intensive peak at finite frequency (ν~ 50 cm{-1}) due to a mixing of the in-plane and out-of-plane responses. The peak disappears for the pure in-plane response and transforms to the Drude-like contribution. Comparative analysis of the mixed and the in-plane contributions allows to extract the c-axis conductivity which shows a Josephson plasma resonance at 11.7 cm{-1} in the superconducting state.

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A. Pimenov, A. V. Pronin, A. Loidl, A. Tsukada, M. Naito. 2002-09-09. On the peak in the far-infrared conductivity of strongly anisotropic cuprates. https://doi.org/10.1103/physrevb.66.212508

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