2013/06/11 by D. W. Jeong, Hong Chul Choi, Choong H. Kim +20 · 42 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Algorithm #Computer science #Condensed matter physics #Electronic and Structural Properties of Oxides #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Physics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.110.247202
published in Physical Review Letters 110(24), 247202 (American Physical Society)
openalex publication_date 2013/06/11 · arxiv created 2013/09/04 · arxiv updated 2013/09/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The temperature (T) dependence of the optical conductivity spectra \ensuremathσ(\ensuremathω) of a single crystal SrRuO3 thin film is studied over a T range from 5 to 450 K. We observed significant T dependence of the spectral weights of the charge transfer and interband d\mathrm\text\ensuremath-d transitions across the ferromagnetic Curie temperature (Tc\ensuremath∼150 K). Such T dependence was attributed to the increase in the Ru spin moment, which is consistent with the results of density functional theory calculations. T scans of \ensuremathσ(\ensuremathΩ,T) at fixed frequencies \ensuremathΩ reveal a clear T2 dependence below Tc, demonstrating that the Stoner mechanism is involved in the evolution of the electronic structure. In addition, \ensuremathσ(\ensuremathΩ,T) continues to evolve at temperatures above Tc, indicating that the local spin moment persists in the paramagnetic state. This suggests that SrRuO3 is an intriguing oxide system with itinerant ferromagnetism.