Many-body effects and non-local charge fluctuations in the double perovskite Sr2FeMoO6

HENRIQUE P. MARTINS; EDUARDO B. GUEDES; RODRIGO J. O. MOSSANEK; FERNANDO D. PRADO; ALBERTO CANEIRO; MIGUEL ABBATE

RSC Advances

Royal Society of Chemistry

Lugar: Londres; Año: 2018 vol. 8 p. 3928 - 3933

We studied the electronic structure of Sr2FeMoO6 using core level and valence band photoemission. The spectra were obtained using high energy X-rays of 1840 eV, which provide bulk sensitive information on the electronic structure. The experimental data were analyzed using the spectral weight from clustermodel calculations. The ground state reveals a large Fe?O and Mo?O hybridization, as well as the importance of non-local Fe?O?Mo charge fluctuations. The latter is crucial to explain the half-metallic character attributed to the Sr2FeMoO6 compound. The core level and valence band photoemission spectra show charge transfer satellites. These satellites are related to many-body effects and are larger for the Fe levels than for the Mo states.