The Magnetic Excitation Spectrum and Thermodynamics of High-T_c Superconductors

Author

Pengcheng Dai
Herbert A. Mook
Stephen M. Hayden
Gabriel Aeppli
Toby G. Perring
Rodney Dale Hunt
Fatih Dogan, Missouri University of Science and TechnologyFollow

Abstract

Inelastic neutron scattering was used to study the wave vector- and frequency-dependent magnetic fluctuations in single crystals of superconducting YBa₂Cu₃O_6+x. The spectra contain several important features, including a gap in the superconducting state, a pseudogap in the normal state, and the much-discussed resonance peak. The appearance of the pseudogap determined from transport and nuclear resonance coincides with formation of the resonance in the magnetic excitations. The exchange energy associated with the resonance has the temperature and doping dependences as well as the magnitude to describe approximately the electronic specific heat near the superconducting transition temperature (T_c).

Recommended Citation

P. Dai et al., "The Magnetic Excitation Spectrum and Thermodynamics of High-T_c Superconductors," Science, vol. 284, no. 5418, pp. 1344 - 1347, American Association for the Advancement of Science, May 1999.

The definitive version is available at https://doi.org/10.1126/science.284.5418.1344

Department(s)

Materials Science and Engineering

Keywords and Phrases

Doping (additives); Magnetic resonance; Neutron scattering; Oxide superconductors; Single crystals; Specific heat of solids; Superconducting transition temperature; Yttrium barium copper oxides; Magnetic excitations; Magnetic fluctuations

International Standard Serial Number (ISSN)

0036-8075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1999 American Association for the Advancement of Science, All rights reserved.

Publication Date

01 May 1999