Abstract
We discuss the discrepancies in the published literature concerning the gap value for 2Δ/kT c as deduced from the superconductivity-induced phonon self-energy changes. In particular, using the established correlation between the appearance of the Raman forbidden chain-related lines at 232 and 598 cm−1 and the phonon self-energy changes of the 340 cm−1 B 1g -like mode below T c we demonstrate the effect of even slight oxygen disorder on the phonon self-energy below T c in pure crystals.
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© 1993 Springer-Verlag Berlin, Heidelberg
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Hadjiev, V.G., Thomsen, C., Cardona, M. (1993). Phonon Self-Energy Effects in YBa2Cu3O7−δ Below Tc: The Role of Oxygen Disorder. In: Kuzmany, H., Mehring, M., Fink, J. (eds) Electronic Properties of High-Tc Superconductors. Springer Series in Solid-State Sciences, vol 113. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-84865-0_37
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DOI: https://doi.org/10.1007/978-3-642-84865-0_37
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