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Lattice dynamics of 123 superconductors

✍ Scribed by W. Reichardt; D. Ewert; E. Gering; F. Gompf; L. Pintschovius; B. Renker; G. Collin; A.J. Dianoux; H. Mutka

Book ID
103933914
Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
436 KB
Volume
156-157
Category
Article
ISSN
0921-4526

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✦ Synopsis

We report about systematic studies on the phonon spectra of 123 superconductors by means of inelastic neutron scattering using polycrystalline samples. We did not observe any unusual dependence on the temperature, in particular no changes were found when passing through the superconducting transition temperature. In contrast, very pronounced changes in the phonon spectra occur when superconductivity is destroyed by the removal of 0 or a partial replacement of Cu by Zn. Using small single crystals of YBa,Cu,O,_, we investigated the phonon dispersion curve up to energies -40 meV. The results were used to adjust the parameters of a lattice dynamical model.

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