Eur. Phys. J. B 26, 323-328 (2002)
https://doi.org/10.1140/epjb/e20020096

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 eugene.sherman@kfunigraz.ac.at

Received: 9 August 2001
Revised: 11 January 2002
Published online: 15 April 2002

Abstract

We consider changes in the electron-phonon coupling in high-T_c 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.