Local moment fluctuations in an optimally-doped high Tc superconductor

Details Local moment fluctuations in an optimally-doped high Tc superconductor Local moment fluctuations in an optimally-doped high Tc superconductor

2006-10-27

arxiv.org/abs/cond-mat/0610755v2

Physics

Condensed Matter

Superconductivity

This is a new version, which is substantially different from the previous one. Physical Review B, in print

Scientific paper

We present results of neutron scattering experiments on YBa2Cu3O6.95 (Tc=93K). Our results indicate that magnetic collective modes due to correlated local moments are present both above and below Tc in optimally doped YBCO. The magnon-like modes are robust and not overdamped by itinerant particle-hole excitations, which may point at a substantial static or slowly fluctuating charge inhomogeneity. We compare the experimental results to predictions of the Fermi liquid (FL) theory in the Random Phase Approximation (RPA).

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