Abstract
The dependence of the Maki-Thompson and of the density of states (DOS) depletion contributions from superconducting fluctuations to nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) relaxation is derived in the framework of the diagrammatic theory, applied to layered three-dimensional (3-D) high-Tc superconductors. The regularization procedure devised for the conductivity (A. I. Buzdin, A. A. Varlamov: Phys. Rev. B58, 14195, 1998) is used in order to avoid the divergence of the DOS term. The theoretical results are discussed in the light of NMR-NQR measurements in YBCO and compared with the recent theory (M. Eschrig et al.: Phys. Rev. B59, 12095, 1999), on the basis of the assumption of a purely 2-D spectrum of fluctuations.
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On leave of absence from Department of Theoretical Physics, Moscow Institute for Steel and Alloys, Moscow, Russian Federation
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Mosconi, P., Rigamonti, A. & Varlamov, A.A. Magnetic field dependence of the superconducting fluctuation contribution to NMR-NQR relaxation. Appl. Magn. Reson. 19, 345–354 (2000). https://doi.org/10.1007/BF03162376
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DOI: https://doi.org/10.1007/BF03162376