2009/11/23 by Xiaoping Yang, Yang, Xiaoping, A. N. Yaresko +5 · 4 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electronic structure #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Magnetic circular dichroism #Materials science #Optics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Strongly Correlated Electrons (cond-mat.str-el) #Superlattice #X-ray #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.0911.4349
published in arXiv (Cornell University) (Cornell University) · 11 pages, 8 figures
arxiv created 2009/11/23 · openalex publication_date 2009/11/23 · arxiv updated 2009/12/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The origin of x-ray magnetic circular dichroism (XMCD) at the Cu L2,3 edge in YBa2Cu3O7/La(1-x)Ca(x)MnO3 superlattices is revealed by performing first-principle electronic structure calculation using fully-relativistic spin-polarized linear muffin-tin orbital and projected augmented plane wave methods. We show that the XMCD spectra at the Cu L2,3 edges are proportional to the difference of the densities of majority- and minority-spin Cu 3z2-1 states. Although the Cu 3z2-1 states lie well below the Fermi level, a small number of majority-spin 3z2-1 holes is created by the Cu 3z2-1 - O pz - Mn 3z2-1 hybridization across the interface. Even this tiny number of holes is sufficient to produce appreciable Cu L2,3 XMCD. The robustness of this conclusion is verified by studying the influence of doping, atomic relaxation, correlation effects, and antiferromagnetic order in a CuO2 plane on the XMCD spectra.