Temperature effects in the optical absorption of superconducting YBa2Cu3O(7-delta) films
Abstract
The behavior of the absorption spectra of superconducting YBa2Cu3O(7-delta) films in the energy range 1.5-3 eV was investigated experimentally as a function of temperature in the range 25-300 K. The spectra are found to be sensitive to the superconducting transition. An exciton maximum is identified at 1.95 eV, which is associated with the transition from the near-Fermi states. The observed freezing of the absorption spectrum below Tc is attributed to a temperature resonance of the Fermi level.
- Publication:
-
Fizika Nizkikh Temperatur
- Pub Date:
- July 1991
- Bibcode:
- 1991FizNT..17..818F
- Keywords:
-
- Absorption Spectra;
- Copper Oxides;
- High Temperature Superconductors;
- Mixed Oxides;
- Superconducting Films;
- Temperature Effects;
- Atomic Energy Levels;
- Barium Oxides;
- Energy Spectra;
- Transition Temperature;
- Yttrium Oxides;
- Solid-State Physics