| Issue |
Europhys. Lett.
Volume 59, Number 2, July 2002
|
|
|---|---|---|
| Page(s) | 258 - 264 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00235-7 | |
| Published online | 01 July 2002 | |
Photoemission spectral weight transfer and mass renormalization
in the Fermi-liquid system La
SrxTiO
1
Department of Physics, University of Tokyo - Bunkyo-ku,
Tokyo 113-0033, Japan
2
Department of Complexity Science
and Engineering, University of Tokyo Bunkyo-ku, Tokyo 113-0033,
Japan
3
Department of Applied Physics, University of
Tokyo Bunkyo-ku, Tokyo 113-8656, Japan
Received:
19
March
2002
Accepted:
30
April
2002
We have performed a photoemission study of
LaSrxTiO near the filling-control
metal-insulator transition (MIT) as a function of hole doping. The
spectral intensity at the chemical potential (μ) and the mass
enhancement factor deduced from the bandwidth show qualitatively
the same doping dependence as the specific coefficient γ
except for near the MIT, where additional mass renormalization may
occur in the vicinity of μ. Upon antiferromagnetic ordering,
spectral weight transfer occurs from the coherent to the incoherent
parts, which we associate with the
partial gap opening at μ.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 71.30.+h – Metal-insulator transitions and other electronic transitions / 79.60.-i – Photoemission and photoelectron spectra
© EDP Sciences, 2002
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