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APS » Journals » Phys. Rev. Lett. » Volume 66 » Issue 6
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Phys. Rev. Lett. 66, 821–824 (1991)

Magnetic fluctuations in La1.95Ba0.05CuO4

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S. M. Hayden, G. Aeppli, H. Mook, D. Rytz, M. F. Hundley, and Z. Fisk
Institut Laue-Langevin, BP 156X, 38042 Grenoble, France
AT&T Bell Laboratories, Murray Hill, New Jersey 07974
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
Sandoz Optoelectronics, Bau 88, CH-4002 Basel, Switzerland
Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Received 9 November 1990; published in the issue dated 11 February 1991

Neutron-scattering and resistivity experiments on single crystals of La1.95Ba0.05CuO4 are described. On warming to as high as 250 K, the correlation length does not change, and the temperature dependence of the generalized susceptibility χ(Q,ω) is due solely to the temperature-dependence of the local response. We show that the associated relaxation rate in the metallic regime is ħΓ≃1/2kBT, in accord with the marginal-Fermi-liquid hypothesis, and relate our results to nuclear spin-lattice relaxation data.

© 1991 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.66.821
DOI:
10.1103/PhysRevLett.66.821
PACS:
75.30.Ds, 71.30.+h, 74.70.Vy, 75.50.Ee
 
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