Loss for photoemission versus gain for Auger: Direct experimental evidence of crystal-field splitting and charge transfer in photoelectron spectroscopy

Article

关键词: RESONANT RAMAN-SCATTERING;    RAY-ABSORPTION-SPECTRA;    AR K EDGE;    ELECTRONIC-STRUCTURE;    3D-TRANSITION-METAL OXIDES;    SATELLITES;    THRESHOLD;    RADIATION;    SRTIO3;   

DOI  :  10.1103/PhysRevB.91.201412

来源: SCIE

【 摘 要 】

We find a 5 eV satellite in the Ti 1s photoelectron spectrum of the transition-metal oxide SrTiO3. This satellite appears in addition to the well-studied 13 eV structure that is typically associated with the Ti 2p core line. We give direct experimental evidence that the presence of two satellites is due to the crystal-field splitting of the metal 3d orbitals. They originate from ligand 2p t(2g) -> metal 3d t(2g) and ligand 2p e(g) -> metal 3d e(g) monopole charge-transfer excitations within the sudden approximation of quantum mechanics. This assignment is made by the energetics of the resonant and high-energy threshold behaviors of the TiK-L2L3 Auger decay that follows Ti 1s photoionization.

【 授权许可】

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