• Magnetic and orbital ordering of RuO/sub 2/ planes in RuSr/sub 2/ (Eu,Gd) Cu/sub 2/O/sub 8/ 

      Aligia, Armando A.; Gusmao, Miguel Angelo Cavalheiro (2004) [Artigo de periódico]
      We start from an effective Hamiltonian for Ru ions in a square lattice, which includes the on-site interactions between t2g orbitals derived from Coulomb repulsion, and a tetragonal crystal-field splitting. Using perturbation ...
    • Spin-orbit interactions of light 

      Cisowski, Claire Marie (2019) [Tese]
      In the past decades, technological advances in the field of Optics have allowed to explore electromagnetic fields with rich scalar and vectorial properties. Their study have challenged our understanding of one of a fundamental ...