ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

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.

[img] PDF
Spectroscopic_investigations_of_the_electronic_structure_and_metal-insulator_transitions.pdf
Restricted to Registered users only

Download (172Kb) | Request a copy

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
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 11 Sep 2006
Last Modified: 19 Sep 2010 04:30
URI: http://eprints.iisc.ernet.in/id/eprint/8165

Actions (login required)

View Item View Item