Probing electron-phonon coupling in high-T superconductors by site-selective isotope substitution
Institute for Theoretical Physics, Karl-Franzens-University-Graz, 8010 Graz, Austria
Corresponding author: a email@example.com
Revised: 11 January 2002
Published online: 15 April 2002
We consider changes in the electron-phonon coupling in high-Tc cuprates caused by site-selective oxygen isotope substitution. Contrary to the total substitution, the site-selective replacement influences the coupling constant for each phonon mode due to the induced changes in the phonon eigenvectors. The relative changes for some modes can be larger than 100%. The measured properties sensitive to these changes are discussed.
PACS: 63.20.Kr – Phonon-electron and phonon-phonon interactions / 74.25.Kc – Phonons
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002