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

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.

4 pages, 4 figures included

References in corpus (9)

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Cited by in corpus (9)

• Optical and thermodynamic properties of the high-temperature superconductor HgBa_2CuO_4+delta
• In-plane optical conductivity of La${}_{2-x}$Sr${}_x$CuO${}_4$: Reduced superconducting condensate and residual Drude-like response
• Superconducting Fluctuation investigated by THz Conductivity of La${}_{2-x}$Sr${}_x$CuO${}_4$ Thin Films
• Comment on ''Phase Diagram of La${}_{2-x}$Sr${}_x$CuO${}_4$ Probed in the Infrared: Imprints of Charge Stripe Excitations''
• BCS $d$-wave behavior in the THz electrodynamic response of electron-doped cuprate superconductors
• Reflectivity measurements in uniaxial superconductors: a methodological discussion applied to the case of La(2-x)Sr(x)CuO(4)
• Optical absorption in tilted geometries as an indirect measurement of longitudinal plasma waves in layered cuprates
• Far-infrared and submillimeter-wave conductivity in electron-doped cuprate La_{2-x}Ce_xCuO_4
• Effects of Ca substitution on quasi-acoustic sliding modes in Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$