2011/05/31 by Н. В. Павленко, N. Pavlenko, Thilo Kopp +5 · 4 citations
Engineering · Materials Science · Physics and Astronomy · #Algorithm #Computer science #Condensed matter physics #Density functional theory #Electronic and Structural Properties of Oxides #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetism #Materials science #Physics #Quantum mechanics #Semiconductor materials and devices #State (computer science) #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.85.020407
published as Phys. Rev. B 85, 020407(R) (2012) · 5 pages, 4 figures, to appear in Physical Review B (Rapid Communications)
arxiv created 2012/01/11 · openalex publication_date 2012/01/19 · arxiv updated 2012/01/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Ferromagnetism and superconductivity are, in most cases, adverse. However, recent experiments reveal that they coexist at interfaces of LaAlO3 and SrTiO3. We analyze the magnetic state within density functional theory and provide evidence that magnetism is not an intrinsic property of the two-dimensional electron liquid at the interface. We demonstrate that the robust ferromagnetic state is induced by the oxygen vacancies in SrTiO3 or in the LaAlO3 layer. This allows for the notion that areas with increased density of oxygen vacancies produce ferromagnetic puddles and account for the previous observation of a superparamagnetic behavior in the superconducting state.