We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with photoemission spectroscopy (PES) using hard X-rays (HX) (h ν∼ 8 keV) and soft X-rays (SX) (h ν∼ 900 eV). In HX-PES results, the V 2p core levels of SrVO3 and CaVO3 show clear additional intensity, which are not observed in SX-PES. These features originate from bulk screening by coherent states at Fermi level as observed in other 3d transition metal oxides. From the comparison between SrVO3 and CaVO3 in HX-PES, the intensity in SrVO3 is nearly similar to CaVO3. The results suggest screening from coherent states is more efficient in HX-PES compared to SX-PES.
- Bulk electronic structure
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics