Evidence for magnetic pseudoscaling in overdoped La2-xSrxCuO4

Article

关键词: ELECTRONIC RAMAN-SCATTERING;    T-C SUPERCONDUCTORS;    SINGLE-CRYSTALS;    SPIN DYNAMICS;    NORMAL-STATE;    PSEUDOGAP;   

DOI  :  10.1103/PhysRevB.57.R11077

来源: SCIE

【 摘 要 】

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 Gamma(Omega-->0,T) has been determined from the normal state B-1g spectra in the range 50 less than or equal to T less than or equal to 300 K. T(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 T(cr)similar or equal to 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.

【 授权许可】

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