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Anisotropic Charge Modulation in Ladder Planes of Sr_14-xCa_xCu_24O_41

T. Vuletic·T. Ivek·B. Korin-Hamzic·S. Tomic·B. Gorshunov·P. Haas·M. Dressel·J. Akimitsu·T. Sasaki·T. Nagata
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Abstract

The charge response of the ladders in Sr_14-xCa_xCu_24O_41 is characterized by dc resistivity, low frequency dielectric and optical spectroscopy in all three crystallographic directions. The collective charge-density wave screened mode is observed in the direction of the rungs for x=0, 3 and 6, in addition to the mode along the legs. For x=8 and 9, the charge-density-wave response along the rungs fully vanishes, while the one along the legs persists. The transport perpendicular to the planes is always dominated by hopping.

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T. Vuletic, T. Ivek, B. Korin-Hamzic, S. Tomic, B. Gorshunov, P. Haas, M. Dressel, J. Akimitsu, T. Sasaki, T. Nagata. 2004-10-04. Anisotropic Charge Modulation in Ladder Planes of Sr_14-xCa_xCu_24O_41. https://doi.org/10.1103/physrevb.71.012508

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