Josephson Plasma Resonance and Phonon Anomalies in Trilayer Bi_{2}Sr_{2}Ca_{2}Cu_{3}O_{10}
| Autoři | |
|---|---|
| Rok publikování | 2002 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Physical Review Letters |
| Fakulta / Pracoviště MU | |
| Citace | |
| Obor | Fyzika pevných látek a magnetismus |
| Klíčová slova | High-Tc superconductors; Infrared response; phonons; plasmons |
| Popis | 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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