CMT91

Superconducting Fluctuation Effects on the Spin-Lattice Relaxation Rate in YBa₂Cu₃O_6.95

Author: V. F. Mitrovic, H. N. Bachman, W. P. Halperin, M. Eschrig, J. A. Sauls, A. P. Reyes, P. Kuhns and W. G. Moulton
Comments: 4 pages with 3 figures
Journals: Physical Review Letter 82, 2784 (1999) [DOI] [PDF]

Abstract:
We report ⁶³Cu(2) spin-lattice relaxation rate measurements of YBa₂Cu₃O_6.95 in magnetic fields from 2.1 T to 27.3 T obtained from ¹⁷O(2,3) nuclear magnetic resonance spin-spin relaxation. For T < 120 K, the spin-lattice rate increases with increasing magnetic field. We identify this magnetic field dependence with the change in the low-energy spectral weight originating from d-wave pairing fluctuation corrections to the density of states.

[PDF] [arXiv]

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