2009/03/31 by Young Jun Chang, Choong H. Kim, S. -H. Phark +6 · 4 citations
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electronic and Structural Properties of Oxides #Ferromagnetism #Limit (mathematics) #Magnetic and transport properties of perovskites and related materials #Materials science #Mathematical analysis #Mathematics #Nanotechnology #Physics #Quantum dot #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.103.057201
20 pages, 4 figures
arxiv created 2009/07/07 · openalex publication_date 2009/07/30 · arxiv updated 2011/03/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report on a fundamental thickness limit of the itinerant ferromagnetic oxide SrRuO(3) that might arise from the orbital-selective quantum confinement effects. Experimentally, SrRuO(3) films remain metallic even for a thickness of 2 unit cells (uc), but the Curie temperature T(C) starts to decrease at 4 uc and becomes zero at 2 uc. Using the Stoner model, we attributed the T(C) decrease to a decrease in the density of states (N(o)). Namely, in the thin film geometry, the hybridized Ru d(yz,zx) orbitals are terminated by top and bottom interfaces, resulting in quantum confinement and reduction of N(o).