# Electronic structure of ${\rm Ca}_{1-x}{\rm Sr}_x{\rm VO}_3$: A tale of two energy scales

Makino, H and Cimino, R and Pedio, M and Goto, T and Sarma, DD and Maiti, K and Rozenberg, MJ and Inoue, IH (2001) Electronic structure of ${\rm Ca}_{1-x}{\rm Sr}_x{\rm VO}_3$: A tale of two energy scales. In: EPL: Europhysics Letters, 55 (2). pp. 246-252.

 PDF Electronic_structure_of.pdf - Published Version Restricted to Registered users only Download (325Kb) | Request a copy

## Abstract

We investigate the electronic structure of Ca1-xSrxVO3 using photoemission spectroscopy. Core level spectra establish an electronic phase separation at the surface, leading to a distinctly different surface electronic structure compared to the bulk. Analysis of the photoemission spectra of this system allowed us to separate the surface and bulk contributions. These results help us to understand properties related to two vastly differing energy scales, namely the low-energy scale of thermal excitations ( $\sim\!k_{\rm B}T$) and the high-energy scale related to Coulomb and other electronic interactions.

Item Type: Journal Article Copyright of this article belongs to EDP Sciences. Division of Chemical Sciences > Solid State & Structural Chemistry Unit 09 Nov 2011 09:46 09 Nov 2011 09:46 http://eprints.iisc.ernet.in/id/eprint/39544