Abstract
We present results of neutron scattering experiments on (YBCO) . Our results indicate that magnetic collective modes due to correlated local moments are present both above and below in optimally doped YBCO. The magnon-like modes are robust and not overdamped by itinerant particle-hole excitations. We compare the experimental results to predictions of the Fermi-liquid (FL) theory in the random phase approximation.
- Received 26 February 2008
DOI:https://doi.org/10.1103/PhysRevB.78.132503
©2008 American Physical Society