LOCALIZED MOMENTS AND SPIN EXCITATIONS IN THE SUPERCONDUCTING TL2BA2CUO6+X

Authors
VYASELEV OM SCHEGOLEV IF
Citation
Om. Vyaselev et If. Schegolev, LOCALIZED MOMENTS AND SPIN EXCITATIONS IN THE SUPERCONDUCTING TL2BA2CUO6+X, Czechoslovak journal of Physics, 46, 1996, pp. 1137-1138
Citations number
6
Categorie Soggetti
Physics
Journal title
Czechoslovak journal of Physics → ACNP
ISSN journal
00114626
Volume
46
Year of publication
1996
Supplement
2
Pages
1137 - 1138
Database
ISI
SICI code
0011-4626(1996)46:<1137:LMASEI>2.0.ZU;2-K
Abstract
The presence of localized paramagnetic centers (LPCs) in Tl2Ba2CuO6+x is revealed from the Cu-63 and Tl-205 NMR. Concentration of these cent ers is found growing with oxygen doping, hence they may be responsible for depressing T-c. Contribution to the relaxation rate associated wi th quasiparticle spins has a power temperature dependence far below T- c indicating to the presence of Sap zeroes at the Fermi surface. These Sap nodes may appear in s-wave pairing case due to the presence of ma gnetic impurities.