{sup 17}O NMR Evidence for a Pseudogap in the Monolayer HgBa{sub 2}CuO{sub 4+{ital {delta}}}
- LPS, URA2 CNRS, 91405 Orsay Cedex (France)
- CEA-Saclay, Service de Physique de l`Etat Condense, DRECAM/SPEC, 91191 Gif sur Yvette Cedex (France)
Measurements of the spin shift {sup 17}K{sub s} have been performed for the {sup 17}O NMR line in the monolayer cuprate HgBa{sub 2}CuO{sub 4+{delta}}, and yield the spin susceptibility {chi}{sub s}(T) of the CuO{sub 2} planes. In the underdoped regime, {chi}{sub s} is found to extrapolate to zero at T0. This indicates that a pseudogap opens at T{sup *}{gt}T{sub c}, as in YBa{sub 2}Cu{sub 3}O{sub 6.6}. Therefore, the pseudogap features cannot be explained in terms of a magnetic coupling between CuO{sub 2} planes in bilayer systems. In the overdoped regime, {chi}{sub s}(T) obeys a Pauli-like law, as found in the overdoped Ti{sub 2}Ba{sub 2}CuO{sub 6}. Comparing the different monolayer systems, we suggest some correlation between T{sub c} and distortion effects in the planes, as monitored by the {sup 17}O NMR linewidth. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 544331
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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