APS » PROLA » Phys. Rev. Lett. » Volume 82 » Issue 13

Phys. Rev. Lett. 82, 2784 - 2787 (1999)

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

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V. F. Mitrović, H. N. Bachman, W. P. Halperin, M. Eschrig, and J. A. Sauls
Department of Physics and Astronomy, and Science and Technology Center for Superconductivity, Northwestern University, Evanston, Illinois 60208

A. P. Reyes, P. Kuhns, and W. G. Moulton
National High Magnetic Field Laboratory, Tallahassee, Florida 32310

Received 30 July 1998

We report 63Cu(2) spin-lattice relaxation rate measurements of YBa2Cu3O6.95 in magnetic fields from 2.1 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.


©1999 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v82/p2784
DOI: 10.1103/PhysRevLett.82.2784
PACS: 74.25.Nf, 74.40.+k, 74.72.Bk

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