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arXiv · cond-mat/9712311

Pseudogap and incommensurate magnetic fluctuations in YBa_2Cu_3O_{6. 6}

P. Dai·H. A. Mook·F. Dogan
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Abstract

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 $YBa_2Cu_3O_{6.6}$ ($T_c=62.7$ K). We find that a pseudogap opens in the spin fluctuation spectrum at temperatures well above $T_c$. 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.

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P. Dai, H. A. Mook, F. Dogan. 1997-12-29. Pseudogap and incommensurate magnetic fluctuations in YBa_2Cu_3O_{6. 6}. https://doi.org/10.1016/s0921-4526(97)00633-9

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