Substitution effects on the electronic anomaly and superconductivity in La{sub 2-x}Ba{sub x}CuO{sub 4} and La{sub 2-x}Sr{sub x}CuO{sub 4} with x {approximately} 1/8

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00768405· OSTI ID:457183

Koike, Yoji; Takeuchi, Shuichi; Sato, Hidetaka; Hama, Yuichiro ^[1]

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1. Tohoku Univ., Sendai (Japan); and others

The effects of substitution of Y or Bi on the low-temperature structural phase transition, electronic anomaly and superconductivity have been studied in La{sub 2{minus}y{minus}x}Y{sub y}Ba{sub x}CuO{sub 4}, La{sub 2{minus}y{minus}x}Bi{sub y}Ba{sub x}CuO{sub 4}, and La{sub 1.9{minus}y{minus}x}Tb{sub 0.1}Bi{sub y}Sr{sub x}CuO{sub 4} with x = 1/8. Moreover, an electronic anomaly, which is analogous to those observed in La{sub 2{minus}x}Ba{sub x}CuO{sub 4} and La{sub 1.6{minus}x}Nd{sub 0.4}Sr{sub x}CuO{sub 4} with x {approximately} 1/8, has been found below about 60 K in the thermoelectric power measurements for the Zn-substituted La{sub 2{minus}x}Sr{sub x}Cu{sub 1{minus}y}Zn{sub y}O{sub 4} with x {approximately} 0.115 and y = 0.01 - 0.02. These experimental results support the conclusions by Tranquada et al. that static order of the stripe correlations of holes and spins, owing to pinning by the low-temperature structure or impurities (Zn in this case), is the origin of the electronic anomaly, leading to the suppression of superconductivity.

• Sponsoring Organization: USDOE
• OSTI ID: 457183
• Report Number(s): CONF-960808--
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 105; ISSN 0022-2291; ISSN JLTPAC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
LANTHANUM OXIDES
MAGNETIC FLUX
STRONTIUM OXIDES
TRANSITION TEMPERATURE