Physics – Condensed Matter – Superconductivity
Scientific paper
1997-11-25
Phys. Rev. B 57, R11077 (1998)
Physics
Condensed Matter
Superconductivity
RevTex, 4 pages with 3 PS figures included, replaced with minor changes in the text and references
Scientific paper
10.1103/PhysRevB.57.R11077
We report the results of electronic Raman scattering experiments on an overdoped La(1.78)Sr(0.22)CuO(4) single crystal as a function of temperature. The scattering rate Gamma(w->0,T) has been determined from the normal state B(1g) spectra in the range 50 K < T < 300 K. Gamma(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 pseudoscaling regime at about T(cr)=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.
Chen Xue-Kun
Devereaux Thomas P.
Hewitt K. C.
Irwin J. C.
Kimura Tadahiko
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