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Recent experimental and theoretical studies have established that thespin-lattice relaxation rate, $1/T_1$, measured in nuclear magnetic resonance(NMR) experiments is a site-sensitive probe for the electronic spectrum in themixed state of the high-$T_c$ cuprates. While some groups suggested that$1/T_1$ is solely determined by spin-flip scattering of BCS-like electrons,other groups stressed the importance of antiferromagnetic spin-fluctuations. Weshow that these two relaxation mechanisms give rise to a {\it qualitatively}different temperature and frequency dependence of $^{17}$O $1/T_1$. Acomparison of our results with the experimental $^{17}$O $1/T_1$ data providessupport for a relaxation mechanism dominated by antiferromagneticspin-fluctuations.Comment: 6 pages, 5 figure

physical review. b, condensed matter

Spin-lattice relaxation in the mixed state of the high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>cuprates: Electronic spin-flip scattering versus spin fluctuations

Spin-lattice relaxation in the mixed state of the high-Tccuprates: Electronic spin-flip scattering versus spin fluctuations