Unpolarized inelastic neutron scattering is used to study the temperature and wave vector dependence of the dynamical magnetic susceptibility, χ′′(q,ω), of a well characterized single crystal YBa2Cu3O6.6 (Tc=62.7 K). We find that a pseudogap opens in the spin fluctuation spectrum at temperatures well above Tc. We speculate that the appearance of the low frequency incommensurate fluctuations is associated with the opening of the pseudogap. To within the error of the measurements, a gap in the spin fluctuation spectrum is found in the superconducting state.
@article{arxiv.cond-mat/9712311,
title = {Pseudogap and incommensurate magnetic fluctuations in YBa_2Cu_3O_{6. 6}},
author = {P. Dai and H. A. Mook and F. Dogan},
journal= {arXiv preprint arXiv:cond-mat/9712311},
year = {2016}
}
Comments
6 pages, 3 ps figs, Proceedings of ICNS, Physica B, to be published