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Phys. Rev. Lett. 82, 177 - 180 (1999)

Magnetic Field Independence of the Spin Gap in YBa2Cu3O7-δ

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K. Gorny1, O. M. Vyaselev1 *, J. A. Martindale1, V. A. Nandor1, C. H. Pennington1, P. C. Hammel2, W. L. Hults2, J. L. Smith2, P. L. Kuhns3, A. P. Reyes3, and W. G. Moulton3
1Department of Physics, The Ohio State University, 174 W. 18th Avenue, Columbus, Ohio 43210
2Los Alamos National Laboratory, Los Alamos, New Mexico 87545
3National High Magnetic Field Laboratory, Tallahassee, Florida 32310

Featured in Phys. Rev. Focus Received 15 September 1998

We report, for magnetic fields of 0, 8.8, and 14.8 T, measurements of the temperature dependent 63Cu NMR spin lattice relaxation rate for near optimally doped YBa2Cu3O7-δ, near and above Tc. In sharp contrast with previous work we find no magnetic field dependence. We discuss experimental issues arising in measurements of this required precision and implications of the experiment regarding issues including the spin gap or pseudogap.


©1999 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v82/p177
DOI: 10.1103/PhysRevLett.82.177
PACS: 74.25.Nf, 74.72.Bk, 76.60.Es

* Permanent address: Institute of Solid State Physics, Chernogolovka, 142432 Russia.

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