Chain charge fluctuations in YBa2Cu4O8 detected via apex oxygen nuclear quadrupolar relaxation

Authors
Mali, M Suter, A Roos, J Brinkmann, D Keller, H Karpinski, J
Citation
M. Mali et al., Chain charge fluctuations in YBa2Cu4O8 detected via apex oxygen nuclear quadrupolar relaxation, PHYSICA C, 341, 2000, pp. 2169-2170
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
341
Year of publication
2000
Part
4
Pages
2169 - 2170
Database
ISI
SICI code
0921-4534(200011)341:<2169:CCFIYD>2.0.ZU;2-O
Abstract
We report a O-17 NMR study of the apex oxygen in YBa2Cu4O8. Applying two in dependent methods we show that the spin-lattice relaxation rate of apex oxy gen is predominantly of quadrupolar origin and is driven by charge fluctuat ions in the double chain. The temperature dependence of this quadrupolar re laxation is different from the temperature dependence of the magnetic relax ation of double chain copper and oxygen. This indicates a possible spin-cha rge separation of the charge carrier quasi-particles in the double chain qu asi-one dimensional conductor.