Interstitial doping and oxygen exchange in superconducting La2CuO4+δ
نویسندگان
چکیده
منابع مشابه
Doping Anomalies and Oxygen Vacancies in Underdoped Superconducting Cuprates
Measurements of thermal conductivity (κ) versus temperature and doping for several cuprate superconductors are discussed. Suppressed values of the normalstate κ and the slope change in κ at Tc, observed near 1/8 doping in both YBa2Cu3O6+x and Hg cuprates, are attributed to local lattice distortions and the suppression of the superconducting condensate, respectively. Both phenomena are proposed ...
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Similar to LaCoO4.14, La2-xSrxCuO4±δ shows oxygen diffusion at moderate temperatures. The Oxygen Isotope Back Exchange (OIBE) experiments are done in order to investigate the effect of strontium on the oxygen diffusion in as grown single crystals of La2-xSrxCuO4±δ (x =0, 0.05, 0.1, 0.15). Neutron diffraction data collected at TriCS@SINQ are in agreement with diffusion measurements achieved by o...
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The microscopic structure of interstitial oxygen in germanium and its associated dynamics are studied both experimentally and theoretically. The infrared absorption spectrum is calculated with a dynamical matrix model based on first-principles total-energy calculations describing the potential energy for the nuclear motions. Spectral features and isotope shifts are calculated and compared with ...
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ژورنال
عنوان ژورنال: Physica C: Superconductivity
سال: 1991
ISSN: 0921-4534
DOI: 10.1016/0921-4534(91)92176-c