title: Low energy electronic excitations in the layered cuprates studied by copper L3 resonant inelastic x-ray scattering.
abstract: We have measured the resonant inelastic x-ray scattering (RIXS) spectra at the Cu L3 edge in a variety of cuprates. Exploiting a considerably improved energy resolution (0.8 eV) we recorded significant dependencies on the sample composition and orientation, on the scattering geometry, and on the incident photon polarization. The RIXS final states correspond to two families of electronic excitations, having local (dd excitations) and nonlocal (charge-transfer) character. The dd energy splitting can be estimated with a simple crystal field model. The RIXS at the L3 edge demonstrates here a great potential, thanks to the resonance strength and to the large 2p spin-orbit splitting.
authors.affiliation: INFM-Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Ghiringhelli
authors.forename: N B
authors.initials: NB
authors.lastname: Brookes
authors.forename: E
authors.initials: E
authors.lastname: Annese
authors.forename: H
authors.initials: H
authors.lastname: Berger
authors.forename: C
authors.initials: C
authors.lastname: Dallera
authors.forename: M
authors.initials: M
authors.lastname: Grioni
authors.forename: L
authors.initials: L
authors.lastname: Perfetti
authors.forename: A
authors.initials: A
authors.lastname: Tagliaferri
authors.forename: L
authors.initials: L
authors.lastname: Braicovich