Enhanced phonon scattering below {Tc} caused by Zn and Ni substitution in La{sub 1.85}Sr{sub 0.15}CuO{sub 4}
Journal Article
·
· Journal of Low Temperature Physics
The thermal conductivity {kappa} has been measured for La{sub 2{minus}x}Sr{sub x}CuO{sub 4} and La{sub 1.85}Sr{sub 0.15}Cu{sub 0.98}M{sub 0.02}O{sub 4} (M; Zn, Ni). The characteristic enhancement in {kappa} below {Tc} was confirmed for La{sub 1.85}Sr{sub 0.15}CuO{sub 4}. The phonon scattering mechanisms were analyzed in detail and the electron-phonon coupling constant {lambda} was estimated to be {approximately}0.05. The {kappa} enhancement becomes indetectable on Zn or Ni substitution for Cu, which indicated survival of the phonon scattering by charge carriers down to lower temperatures as a result of reduced {Tc}.
- Research Organization:
- Iwate Univ., Morioka (JP)
- OSTI ID:
- 20015291
- Journal Information:
- Journal of Low Temperature Physics, Vol. 117, Issue 5-6; Conference: International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, Stockholm (SE), 07/28/1999--08/02/1999; Other Information: PBD: Dec 1999; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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