FIR-spectroscopy on iron-doped YBaCuO ceramics: energy gap,phonons and a band at 500 cm−1 |
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| Authors: | E Seider M Bauer L Genzel H -U Habermeier |
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| Institution: | (1) Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, W-7000 Stuttgart 80, Germany |
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| Abstract: | We have measured the reflectance of superconducting iron-doped YBaCuO ceramics in the frequency range from 20 to 10000 cm–1 for various temperatures above and belowT
c
. In these spectra we could directly observe an energy gap. A Kramers-Kronig analysis was performed. We discuss the temperature dependence of two infrared-active phonons and an absorption band located around 500 cm–1. |
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