Many-body effects and non-local charge fluctuations in the double perovskite Sr 2 FeMoO 6

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

RSC Advances

The Royal Society of Chemistry

Año: 2018 vol. 8 p. 3928 - 3933

We studied the electronic structure of Sr2FeMoO6 using core level and valence band photoemission. Thespectra were obtained using high energy X-rays of 1840 eV, which provide bulk sensitive information onthe 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 theimportance of non-local Fe?O?Mo charge fluctuations. The latter is crucial to explain the half-metalliccharacter attributed to the Sr2FeMoO6 compound. The core level and valence band photoemissionspectra show charge transfer satellites. These satellites are related to many-body effects and are largerfor the Fe levels than for the Mo states.