q dependence of the dynamic susceptibility χ''(q,ω) in superconducting YBa2Cu3O6.6 (Tc=46 K)
- 1. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
- 2. Department of Physics, Nagoya University, Nagoya, 464-01 (Japan)
Description
Q-dependent neutron-scattering measurements of the dynamic susceptibility χ''(q,ω) in superconducting YBa2Cu3O6.6 are presented. The observed magnetic scattering near the antiferromagnetic zone center has a nontrivial, approximately flat-topped q dependence. A separable model of the susceptibility, χ''(q,ω)=χ''(ω)F(q), is found to describe this scattering at all energies in the range 2 meV ≤ℎω≤40 meV. Measurements at temperatures above and below Tc=46 K indicate that the q-dependent ''shape'' function, F(q), is the same in both the superconducting and normal states. A phenomenological expression for F(q) is presented and the physical significance of its parametrization is discussed. These results are compared with current theories in the literature
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 50
- Journal Issue
- 17
- Journal Page Range
- p. 12915-12919.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 26027940
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; CRITICAL TEMPERATURE; ENERGY DEPENDENCE; HIGH-TC SUPERCONDUCTORS; MAGNETIC SUSCEPTIBILITY; MEV RANGE; NEUTRON DIFFRACTION; QUATERNARY ALLOY SYSTEMS; TEMPERATURE DEPENDENCE; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ALLOY SYSTEMS; BARIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; ENERGY RANGE; MAGNETIC PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS