Bulk and surface sensitive high-resolution photoemission study of Mott–Hubbard systems SrVO3 and CaVO3
✍ Scribed by R. Eguchi; T. Kiss; S. Tsuda; T. Shimojima; T. Mizokami; A. Chainani; S. Shin; I.H. Inoue; T. Togashi; S. Watanabe; C.Q. Zhang; C.T. Chen; M. Arita; K. Shimada; H. Namatame; M. Taniguchi
- Book ID
- 104079581
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 97 KB
- Volume
- 378-380
- Category
- Article
- ISSN
- 0921-4526
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✦ Synopsis
We study the electronic structure of Mott-Hubbard systems SrVO 3 and CaVO 3 with bulk and surface sensitive high-resolution photoemission spectroscopy using low-energy photons (hn ¼ 7-21 eV), including a VUV laser. A clear suppression of the density of states within $0:2 eV of the Fermi level ðE F Þ is found. The coherent band in SrVO 3 and CaVO 3 is shown to consist of surface and bulk-derived features. The results indicate that the stronger distortion on the surface of CaVO 3 compared to SrVO 3 is directly reflected in the coherent DOS at E F , consistent with recent theory.