Evidence for Three Fluctuation Channels in the Spin Resonance of the Unconventional Superconductor CeCoIn5

Summary, in English

Polarized inelastic neutron scattering under a magnetic field is used to get a microscopic insight into the spin resonance of the heavy fermion superconductor CeCoIn5. The resonance line shape is found to depend on the neutron polarization: Some of the spectral weight is common to the two polarization channels while the remaining part is distributed equally between them. This is evidence for the spin resonance being a degenerate mode with three fluctuation channels: A Zeeman split contribution and an additional longitudinal mode.

• Author: S. Raymond; K. Kaneko; Arno Hiess; P. Steffens; G. Lapertot
• Department/s: European Spallation Source ESS AB
• Publishing year: 2012
• Language: English
• Publication/Series: Physical Review Letters
• Volume: 109
• Issue: 23
• Links: http://dx.doi.org/10.1103/PhysRevLett.109.237210
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Natural Sciences; Physical Sciences
• Status: Published
• ISBN/ISSN/Other: ISSN: 1079-7114