Dirac quasiparticles and spin-lattice relaxation in the mixed state

Abstract

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.

arXiv comment5 pages, 6 figures, 2 column RevTex4 PRB format

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Cited by in corpus (3)

• Dirac-Bogoliubov-deGennes quasiparticles in a vortex lattice
• Calculated NMR T_2 relaxation due to vortex vibrations in cuprate superconductors
• Relaxation of Nuclear Magnetic Moments and Site-Selective NMR in d-Wave Superconductors