| Issue |
Europhys. Lett.
Volume 55, Number 2, July 2001
|
|
|---|---|---|
| Page(s) | 246 - 252 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2001-00406-6 | |
| Published online | 01 December 2003 | |
Electronic structure of 
: A tale of
two energy scales
1
Solid State and Structural Chemistry Unit, Indian Institute of
Science Bangalore 560012, India
2
Departamento de Física, Universidad de Buenos Aires,
Ciudad Universitaria Pab. I (1428) Buenos Aires, Argentina
3
PRESTO-JST and Electrotechnical Laboratory - Tsukuba 305-8568,
Japan
4
Institute for Materials Research, Tohoku University - Sendai
980-8577, Japan
5
NEC Corporation - Nakahara-ku, Kawasaki 211-8666,
Japan
6
Istituto Struttura della Materia, CNR V. Fosso del
Cavaliere 100, I-00133 Roma, Italy
7
INFN, Sezione di Trieste, Laboratori Area di Ricerca
Padriciano 99, 34012 Trieste, Italy
Corresponding author: sarma@sscu.iisc.ernet.in
Received:
26
February
2001
Accepted:
14
May
2001
We investigate the electronic structure of Ca
SrxVO3
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
(
) and the high-energy scale related to Coulomb
and other electronic interactions.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 71.30.+h – Metal-insulator transitions and other electronic transitions / 79.60.Bm – Photoemission and photoelectron spectra: Clean metal, semiconductor, and insulator surfaces
© EDP Sciences, 2001
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