| Issue |
Europhys. Lett.
Volume 69, Number 6, March 2005
|
|
|---|---|---|
| Page(s) | 984 - 989 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2004-10430-0 | |
| Published online | 16 February 2005 | |
: A two-fluid incoherent metal?
1
Department of Physics, Loughborough University - Loughborough, LE11 3TU, UK
2
Institut für Theoretische Physik, Universität zu Köln 77 Zülpicher Strasse, D-50937 Köln, Germany
Received:
3
September
2004
Accepted:
14
January
2005
We present ab initio LDA+DMFT results for the
many-particle density of states of on the metallic
side of the strongly first-order (T-driven) insulator-metal
transition. In strong contrast to LDA predictions, there is
no remnant of even correlated Fermi-liquid behavior in
the correlated metal. Excellent quantitative agreement with
published photoemission and X-ray absorption experiments is found
in the metallic phase. We argue that the absence of
FL-quasiparticles provides a natural explanation for the
bad-metallic transport for 
. Based on this
agreement, we propose that the I-M transition in is
an orbital-selective Mott transition, and point out the relevance
of orbital-resolved one-electron and optical spectroscopy to
resolve this outstanding issue.
PACS: 71.28.+d – Narrow-band systems; intermediate-valence solids / 71.30.+h – Metal-insulator transitions and other electronic transitions / 72.10.-d – Theory of electronic transport; scattering mechanisms
© EDP Sciences, 2005
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