Pseudogap and Incommensurate Magnetic Fluctuations in YBa₂Cu₃O₆.₆
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.
P. Dai et al., "Pseudogap and Incommensurate Magnetic Fluctuations in YBa₂Cu₃O₆.₆," Physica B: Condensed Matter, vol. 241-243, pp. 524 - 527, Elsevier, Dec 1997.
The definitive version is available at https://doi.org/10.1016/S0921-4526(97)00633-9
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)
Article - Journal
© 1997 Elsevier, All rights reserved.
01 Dec 1997