THE SPIN SUSCEPTIBILITY OF SINGLET CORRELATED OXYGEN BAND IN LA2-XSRXCUO4

Citation
Mv. Eremin et al., THE SPIN SUSCEPTIBILITY OF SINGLET CORRELATED OXYGEN BAND IN LA2-XSRXCUO4, Journal of superconductivity, 9(3), 1996, pp. 299-305
Citations number
19
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter
ISSN journal
08961107
Volume
9
Issue
3
Year of publication
1996
Pages
299 - 305
Database
ISI
SICI code
0896-1107(1996)9:3<299:TSSOSC>2.0.ZU;2-#
Abstract
We have shown that the unconventional temperature dependence of the st atic susceptibility chi(T) of the perovskite high-T-c superconductors above the superconducting transition temperature T-c can be explained in terms of two relevant band models containing the singlet-correlated oxygen band and the copper character band. The usual copper-oxygen Ha miltonian containing hopping and Coulomb repulsion terms has been redu ced to an effective Hubbard-like t - t' - t '' - U-eff model to descri be the low-energy properties. The unusual behaviour of the susceptibil ity is due to thermally activated oxygen holes coming into the hybridi zation singularity peak in the density of states. A possible physical origin of T-max in the temperature dependence of the susceptibility is discussed.