| Autor: |
Laverock, J., Kuyyalil, J., Chen, B., Singh, R. P., Balakrishnan, G., Karlin, B., Woicik, J. C, Smith, K. E. |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 91, 165123 (2015) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.91.165123 |
| Popis: |
We report hard x-ray photoemission spectroscopy measurements of the electronic structure of the prototypical correlated oxide SrxCa1-xVO3. By comparing spectra recorded at different excitation energies, we show that 2.2 keV photoelectrons contain a substantial surface component, whereas 4.2 keV photoelectrons originate essentially from the bulk of the sample. Bulk-sensitive measurements of the O 2p valence band are found to be in good agreement with ab initio calculations of the electronic structure, with some modest adjustments to the orbital-dependent photoionization cross sections. The evolution of the O 2p electronic structure as a function of the Sr content is dominated by A-site hybridization. Near the Fermi level, the correlated V 3d Hubbard bands are found to evolve in both binding energy and spectral weight as a function of distance from the vacuum interface, revealing higher correlation at the surface than in the bulk. |
| Databáze: |
arXiv |
| Externí odkaz: |
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