1999/12/20 by G. M. Zhao, Guangyao Zhao, D. J. Kang +13
Materials Science · Physics and Astronomy · #Advancements in Solid Oxide Fuel Cells #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/9912355
4 pages, 3 figures, submitted to PRL
arxiv created 1999/12/20 · openalex publication_date 1999/12/20 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Oxygen isotope effects on the transport properties have been studied in high-quality epitaxial thin films of La0.75Ca0.25MnO3 and Nd0.7Sr0.3MnO3. In the paramagnetic state, the resistivity can be well fitted by ρ(T) = (A/√(T))exp(Eρ/kBT) with the parameters A and Ea depending strongly on the oxygen isotope mass. The resistivity below 80 K almost perfectly follows ρ= ρo+ Bωs/\sinh2(ℏωs/2kBT) with ℏωs/kB ∼ 100 K. Both ρo and B increase by about 15(3)% upon raplacing 16O by 18O. The results provide quantitative constraints on the basic physics of manganites.