Low-energy spin excitation below 10 meV in non-superconducting lightly-doped Bi2+xSr2-xCuO6+δ(BSCO)x=0.4 was studied by neutron-scattering measurement. We observed a broad single peak centered at (0.5, 0.5) reciprocal position in tetragonal notation. The intensity is enhanced with increasing the temperature, and weakens at the equivalent magnetic position with larger Q. These results indicates that the observed signal is intrinsic spin excitation spectrum, and therefore, we have clarified the existence of spin excitation in the BSCO system for the first time.
- Cuprate superconductors
- Neutron inelastic scattering
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology
- Electronic, Optical and Magnetic Materials