CALCULATION OF THE ELECTRON-ION INTERACTION-POTENTIAL COMPONENTS LINEAR AND QUADRATIC IN THE ION DISPLACEMENTS FOR YBA2CU3O7

Authors
NOVYSH BV DOROZHKIN NN GOLOLOBOV EM ANISHCHIK VM
Citation
Bv. Novysh et al., CALCULATION OF THE ELECTRON-ION INTERACTION-POTENTIAL COMPONENTS LINEAR AND QUADRATIC IN THE ION DISPLACEMENTS FOR YBA2CU3O7, Physics of the solid state, 39(8), 1997, pp. 1174-1177
Citations number
10
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physics of the solid state → ACNP
ISSN journal
10637834
Volume
39
Issue
8
Year of publication
1997
Pages
1174 - 1177
Database
ISI
SICI code
1063-7834(1997)39:8<1174:COTEIC>2.0.ZU;2-P
Abstract
A simple method is proposed to calculate the component of electron int eraction potential with the ionic subsystem of a crystal quadratic in ionic displacement. The electron-ion interaction potential is calculat ed for the high-frequency A(g) modes in YBa2Cu3O7. The important role of the Madelung potential, which results in violation of the selection rules valid in the rigid muffin-tin approximation, is pointed out. Th e quadratic component of the potential can greatly affect the calculat ed matrix elements which correspond to electronic transitions involvin g absorption or emission of zero wave-vector phonons. (C) 1997 America n Institute of Physics.