Dirac quasiparticles and spin-lattice relaxation in the mixed state

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We present the results of quantum-mechanical calculations, using the singular gauge transformation of Franz and Tesanovic, of the rate of planar Cu spin-lattice relaxation due to electron spin-flip scattering in the mixed state of high-Tc cuprate superconductors. The results show a non-monotonic temperature and frequency dependence that differs markedly from semiclassical Doppler-shifted results and challenges the assertion that recent experimental observations of the rate of planar Cu and O spin-lattice relaxation in the mixed state of YBCO point to antiferromagnetic spin fluctuations as a better candidate for the elementary excitations of the superconducting state.
5 pages, 6 figures, 2 column RevTex4 PRB format

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/19630

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0207439
 http://arxiv.org/abs/cond-mat/0207439
 Phys. Rev. B, 66, 144508 (2002)
 doi:10.1103/PhysRevB.66.144508

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arXiv