Doping-induced changes in the electronic structure of LaxSr1−xTiO3: Limitation of the one-electron rigid-band model and the Hubbard model
- Fujimori, A.
- Hase, I.
- Nakamura, M.
- Namatame, H.
- Fujishima, Y.
- Tokura, Y.
- Abbate, M.
- Groot, Frank M. F. de
- Czyzyk, M. T.
- Fuggle, J. C.
- Strebel, O.
- López, María Francisca
- Domke, M.
- Kaindl, G.
Publication date
October 1992
DOI Publisher
American Physical Society (APS) ISSN
0163-1829 Journal
issn:0163-1829 Citation count (estimate)
90Abstract
The electronic structure of LaxSr1−xTiO3 has been studied by photoemission and x-ray absorption spectroscopy. Electron doping through La substitution induces a new photoemission feature of Ti 3d character within the band gap of SrTiO3; the Fermi level is located near the bottom of the conduction band of SrTiO3. The experimental results are incompatible with the rigid-band behavior predicted by one-electron band theory or Hubbard-model calculations.This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan, Fundamenteel Onderzoek der Materie (FOM), and Scheikundig Onderzoek Nederland (SON). The work at Berlin was supported by the Bundesrninister fur Forschung und Techno...
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