Title

Pseudogap and Incommensurate Magnetic Fluctuations in YBa2Cu3O6.6

Abstract

Unpolarized inelastic neutron scattering is used to study the temperature and wave vector dependence of the dynamical magnetic susceptibility, Χ"(q, ω), of a well-characterized single-crystal YBa2Cu3O6.6 (Tc = 62.7 K). We find that a pseudogap opens in the spin-fluctuation spectrum at temperatures well above Tc. We speculate that the appearance of the low-frequency incommensurate fluctuations is associated with the opening of the pseudogap. To within the error of the measurements, a gap in the spin-fluctuation spectrum is found in the superconducting state.

Department(s)

Materials Science and Engineering

Keywords and Phrases

High temperature superconductors; Magnetic permeability; Measurement errors; Neutron scattering; Single crystals; Superconductivity; Thermal effects; Yttrium compounds; Magnetic excitations; Unpolarized inelastic neutron scattering; Oxide superconductors

International Standard Serial Number (ISSN)

9214526

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1997 Elsevier, All rights reserved.

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