Probing the susceptibility {chi}{sup {prime}}({bold q}) in cuprates using Ni impurities
Journal Article
·
· Physical Review, B: Condensed Matter
- Department of Physics and Science and Technology Center for Superconductivity, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801 (United States)
Recent NMR experiments on YBa{sub 2}(Cu{sub 1{minus}x}Ni{sub x}){sub 3}O{sub 6+{delta}} [Bobroff {ital et al.} Phys. Rev. Lett. {bold 79}, 2117 (1997)] have shown that Ni impurities provide an important probe for the momentum dependence of the static spin susceptibility {chi}{sup {prime}}({bold q}). Combining the measurements of the {sup 17}O line width {Delta}{nu} with those of the Gaussian relaxation time T{sub 2G}, we find that the magnetic correlation length {xi} must have a substantial temperature dependence. Using numerical simulations we present a detailed analysis of {Delta}{nu} as a function of temperature and impurity concentration. For a Lorentzian shape of {chi}{sup {prime}}({bold q}) {Delta}{nu} strongly depends on {xi}, in contrast to the Gaussian form. This result together with the experimental finding that {xi} is temperature dependent rules out the Gaussian form of {chi}{sup {prime}}({bold q}). {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 663725
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 58; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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