Spin-gap and the superconducting fluctuations in high-T-c cuprates probed by Cu-63 NMR

Authors
Zheng, GQ Ozaki, H Kitaoka, Y Clark, WG Kodama, Y Kondo, T Shimakawa, Y Kubo, Y Kuhns, P Reyes, AP Moulton, WG
Citation
Gq. Zheng et al., Spin-gap and the superconducting fluctuations in high-T-c cuprates probed by Cu-63 NMR, J PHYS CH S, 62(1-2), 2001, pp. 25-27
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
ISSN journal
00223697 → ACNP
Volume
62
Issue
1-2
Year of publication
2001
Pages
25 - 27
Database
ISI
SICI code
0022-3697(200101/02)62:1-2<25:SATSFI>2.0.ZU;2-M
Abstract
From the Cu-63 Knight shift and the nuclear spin-lattice relaxation rate un der magnetic fields from zero up to 28 T in the underdoped (U) YBa2Cu4O8 an d the slightly overdoped (O) TlSr2CaCu2O6.8 We find that the spin-gap (pseu dogap) behaviors show contrasting response to magnetic fields in the U and O compounds. In the O compound. the spin-gap is strongly field dependent an d can be accounted for by the superconducting fluctuation effects, but that in the U compound shows no field dependence. The implication is discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.