SUBSTITUTION EFFECTS ON THE ELECTRONIC ANOMALY AND SUPERCONDUCTIVITY IN LA2-XBAXCUO4 AND LA2-XSRXCUO4 WITH X-SIMILAR-TO-1 8/

The effects of substitution of Y or Ri on the low-temperature structur al phase transition, electronic anomaly and superconductivity have bee n studied in La2-y-xYyBaxCuO4, La2-y-xBiyBaxCuO4 and La1.9-y-xTb0.1Srx CuO4 with x = 1/8. Moreover, an electronic anomaly, which is analogous to those observed in La2-xBaxCuO4 and La1.6-xNd0.4SrxCuO4 with x simi lar to 1/8, has been found below about 60 K in the thermoelectric powe r measurements for the Zn-substituted La2-xSrxCu1-yZnyO4 with x simila r to 0.115 and y = 0.01 - 0.02. These experimental results support the conclusions by Tranquada et al. that static order of the stripe corre lations of holes and spins, owing to pinning by the low-temperature st ructure or impurities (Zn in this case), is the origin of the electron ic anomaly, leading to the suppression of superconductivity.