SPIN-FLUCTUATION LINEWIDTH OF THE 4F ELECTRON CRYSTAL-FIELD LEVELS INCUPRATES

Authors
KOVACEVIC Z PLAKIDA NM
Citation
Z. Kovacevic et Nm. Plakida, SPIN-FLUCTUATION LINEWIDTH OF THE 4F ELECTRON CRYSTAL-FIELD LEVELS INCUPRATES, Physica. C, Superconductivity, 228(1-2), 1994, pp. 15-21
Citations number
26
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
228
Issue
1-2
Year of publication
1994
Pages
15 - 21
Database
ISI
SICI code
0921-4534(1994)228:1-2<15:SLOT4E>2.0.ZU;2-O
Abstract
The crystal-field excitation linewidth GAMMA(cf)(T) in the Tm-YBCO sys tem due to s-f interactions is calculated. The method of the two-time Green functions was used in the two-level approximation for crystal-fi eld excitations. It is shown that the antiferromagnetic fluctuations i n CuO2 planes are important to explain the temperature dependence of G AMMA(cf).