Observation of the Transverse Optical Plasmon in SmLa0.8Sr0.2CuO4-d

Details Observation of the Transverse Optical Plasmon in SmLa0.8Sr0.2CuO4-d Observation of the Transverse Optical Plasmon in SmLa0.8Sr0.2CuO4-d

2001-02-22

arxiv.org/abs/cond-mat/0102411v1

Phys. Rev. Lett. 86, 4144-4147 (2001)

Physics

Condensed Matter

Superconductivity

REVTeX, 4 pages, 5 eps-figures, PRL, in press

Scientific paper

10.1103/PhysRevLett.86.4144

We present microwave and infrared measurements on SmLa0.8Sr0.2CuO4-d, which are direct evidence for the existence of a transverse optical plasma mode, observed as a peak in the c-axis optical conductivity. This mode appears as a consequence of the existence of two different intrinsic Josephson couplings between the CuO2 layers, one with a Sm2O2 block layer, and the other one with a (La,Sr)O block layer. From the frequencies and the intensities of the collective modes we determine the value of the compressibility of the two dimensional electron fluid in the copper oxygen planes.

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