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Spectral functions in doped transition metal oxides

Sarma, DD and Barman, SR and Kajueter, H and Kotliar, G (1996) Spectral functions in doped transition metal oxides. In: Europhysics Letters, 36 (4). pp. 307-312.

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We present experimental photoemission and inverse hotoemission spectra of $SrTiO_{3-\delta}$ representing electron-doped $d^0$ systems. Photoemission spectra in the presence of electron doping exhibit prominent features arising from electron correlation effects, while the inverse photoemission spectra are dominated by spectral features explainable within singleparticle approaches. We show that such a spectral evolution in chemically doped correlated systems is not compatible with expectations based on Hubbard or any other similar model. We present a new theoretical approach taking into account the inhomogeneity of the real system which gives qualitatively different results compared to standard homogeneous models and is in quantitative agreement with experiments.

Item Type: Journal Article
Publication: Europhysics Letters
Publisher: EDP Sciences
Additional Information: Copyright of this article belongs to EDP Sciences.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 13 Dec 2006
Last Modified: 19 Sep 2010 04:33
URI: http://eprints.iisc.ac.in/id/eprint/9101

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