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APS » Journals » Phys. Rev. B » Volume 57 » Issue 18
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Phys. Rev. B 57, R11077–R11080 (1998)

Evidence for magnetic pseudoscaling in overdoped La2-xSrxCuO4

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J. G. Naeini, X. K. Chen, K. C. Hewitt, and J. C. Irwin
Department of Physics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada

T. P. Devereaux
Department of Physics, George Washington University, Washington, D.C. 20052

M. Okuya*, T. Kimura†, and K. Kishio
Department of Superconductivity, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan

Received 20 November 1997; published in the issue dated 1 May 1998

We report the results of electronic Raman-scattering experiments on an overdoped La1.78Sr0.22CuO4 single crystal as a function of temperature. The scattering rate Γ(Ω⃗0,T) has been determined from the normal state B1g spectra in the range 50<~T<~300 K. Γ(T) decreases linearly from 300 K to about 175 K and then undergoes a reduction with respect to the expected mean-field behavior. This trend suggests a crossover to a magnetic pseudoscaling regime at Tcr≃160 K. The results are in good agreement with the prediction of the nearly antiferromagnetic Fermi-liquid model. There is no evidence of a pseudogap in the spectra obtained from this overdoped sample.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.57.R11077
DOI:
10.1103/PhysRevB.57.R11077
PACS:
74.25.Gz, 74.72.Dn, 78.30.Er

*Present address: Department of Material Science, Shizuoka University, Johoku, Hamamatsu 432, Japan.

†Present address: Joint Research Center for Atom Technology, Higashi, Tsukuba 305, Japan.

 
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