Josephson Plasma Resonance and Phonon Anomalies in Trilayer Bi_{2}Sr_{2}Ca_{2}Cu_{3}O_{10}

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Authors

BORIS A. V. DUBROKA Adam MUNZAR Dominik KOVALEVA N. N. LIANG B. LIN C. T. DUBROKA Adam PIMENOV A. V. HOLDEN T. KEIMER B. MATHIS Y. L. BERNHARD C.

Year of publication 2002
Type Article in Periodical
Magazine / Source Physical Review Letters
MU Faculty or unit

Faculty of Science

Citation
Field Solid matter physics and magnetism
Keywords High-Tc superconductors; Infrared response; phonons; plasmons
Description The far-infrared (FIR) c axis conductivity of a Bi 2223 crystal has been measured by ellipsometry. Below Tc a strong absorption band develops near 500 cm^{-1}, corresponding to a transverse Josephson plasmon. The related increase in FIR spectral weight leads to a giant violation of the Ferrel-Glower-Tinkham sum rule. The gain in c axis energy accounts for a sizable part of the condensation energy. We also observe phonon anomalies which suggest that the Josephson currents lead to a drastic variation of the local electric field within the block of the closely spaced CuO_{2} planes
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