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]
We report 63Cu(2) spin-lattice relaxation rate measurements of YBa2Cu3O6.95 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.