Role of Ti-Ru interaction in SrTi 0.5 Ru 0.5 O 3: physical properties, x-ray spectroscopy, and cluster model calculations - Guedes, E. B; Abud, Fábio Santos Alves; Martins, H. P.; Abbate, M; Jardim, Renato de Figueiredo; Mossanek, Rodrigo (Physical Review B, 2019)