Spectroscopic investigations of the electronic structure and metal-insulator transitions in a Mott-Hubbard system $La_{1-x}Ca_xVO_3$

Maiti, K and Sarma, DD (2000) Spectroscopic investigations of the electronic structure and metal-insulator transitions in a Mott-Hubbard system $La_{1-x}Ca_xVO_3$. In: Physical Review B, 61 (4). pp. 2525-2534.

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Abstract

We investigate the electronic structure of $La_{1-x}Ca_xVO_3$ for various values of x. $LaVO_3$ is a Mott-Hubbard insulator with band gap of about $1.0 \pm 0.2 eV$. Hole doping in this system leads to the growth of a new feature at the Fermi level for $x\geq 0.2$, suggesting an insulator-to-metal transition. In addition, the metallic compositions show a metal-insulator transition between the bulk and the surface. We separate the surface and bulk electronic structures from the experimental spectra. The evolution of the bulk electronic structure as a function of doping is characterized by a spectral weight transfer from the incoherent to the coherent feature.

Item Type: Journal Article Physical Review B American Institute of Physics Copyright of this article belongs to American Institute of Physics. Division of Chemical Sciences > Solid State & Structural Chemistry Unit 11 Sep 2006 19 Sep 2010 04:30 http://eprints.iisc.ac.in/id/eprint/8165