Superconducting Fluctuation Effects on the Spin-Lattice Relaxation Rate in YBa2Cu3O6.95
Abstract
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.
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