Anisotropic Charge Modulation in Ladder Planes of Sr_14-xCa_xCu_24O_41

Details Anisotropic Charge Modulation in Ladder Planes of Sr_14-xCa_xCu_24O_41 Anisotropic Charge Modulation in Ladder Planes of Sr_14-xCa_xCu_24O_41

2004-03-24

arxiv.org/abs/cond-mat/0403611v2

Phys. Rev. B 71, 012508 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures, submitted to PRB RC

Scientific paper

10.1103/PhysRevB.71.012508

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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