Josephson Plasma Resonance and Phonon Anomalies in Trilayer Bi_{2}Sr_{2}Ca_{2}Cu_{3}O_{10}
| Authors | |
|---|---|
| Year of publication | 2002 |
| Type | Article in Periodical |
| Magazine / Source | Physical Review Letters |
| MU Faculty or unit | |
| 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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