2000/05/31 by N. Kida, M. Hangyo, Masanori Hangyo +2 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Solid-state spectroscopy and crystallography #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.62.r11965
published as Phys. Rev. B 62, R11965-R11968 (2000) · REVTeX 13 pages, 3 figures
arxiv created 2000/09/11 · openalex publication_date 2000/11/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Direct experimental estimations of the low-energy (1.5--10 meV) complex dielectric constants spectrum and its temperature variation have been investigated for La0.7Ca0.3MnO3 thin films using terahertz time-domain spectroscopy. At low temperatures, a clear Drude term emerges. With increasing temperature, the scattering rate increases, while the plasma frequency decreases, both derived from a simple Drude model. Finally, a Drude term submerges well below the insulator-metal transition temperature. On the basis of the present results, low-energy charge dynamics are discussed.