Anomalous behavior of phonons in superconducting Tl2Ba2Ca2Cu3O10 detected by far-infrared spectroscopy
Abstract
We report anomalous behavior of phonons in superconducting Tl2Ba2Ca2Cu3O10 at Tc(~112 K) detected by a far-infrared reflectivity study of a ceramic sample. Our results indicate strong and abrupt softening of an infrared-active phonon and a decrease of oscillator strength of this and of another phonon. We associate the effects with anomalous vibrations of the bridging oxygen in the BaO layers and the off-center oxygen in the TlO layers, respectively. Our results give experimental evidence for strong electron-phonon interaction.
- Publication:
-
Physical Review B
- Pub Date:
- May 1990
- DOI:
- 10.1103/PhysRevB.41.9499
- Bibcode:
- 1990PhRvB..41.9499Z
- Keywords:
-
- 74.70.Vy;
- 63.20.Kr;
- 78.30.Er;
- Phonon-electron and phonon-phonon interactions;
- Solid metals and alloys