Pseudogap and Incommensurate Magnetic Fluctuations in YBa₂Cu₃O₆.₆

Author

Pengcheng Dai
Herbert A. Mook
Fatih Dogan, Missouri University of Science and TechnologyFollow

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 YBa₂Cu₃O_6.6 (T_c = 62.7 K). We find that a pseudogap opens in the spin-fluctuation spectrum at temperatures well above T_c. 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.

Recommended Citation

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

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)

0921-4526

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1997 Elsevier, All rights reserved.

Publication Date

01 Dec 1997