| Issue |
Europhys. Lett.
Volume 42, Number 6, June II 1998
|
|
|---|---|---|
| Page(s) | 673 - 678 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00304-5 | |
| Published online | 01 September 2002 | |
Can the Fermi surface be sharper than 
?
1
Racah Institute of Physics, Hebrew University - Jerusalem 91904, Israel
2
Institute of Superconductivity, Department of Physics, Bar-Ilan University
Ramat-Gan 52900, Israel
Received:
12
August
1997
Accepted:
7
May
1998
We consider a “metal” with a mean free path possessing a sharp maximum at
the Fermi surface. At finite temperature, the width of this maximum is close
to 
. We show that the electrical conductivity of this system behaves
as if the peak of the mean free path remains sharp at finite temperatures.
In contrast to the well-known normal situation, the resistivity due to
elastic scattering is surprisingly found to be linear in temperature, and
the resistivity due to scattering by phonons is proportional to T2. This
model is proposed to relate to some properties of “doped insulators”, such
as cuprates, organic metals and fullerenes.
PACS: 71.45.Gm – Exchange, correlation, dielectric and magnetic functions, plasmons / 72.10.Bg – General formulation of transport theory
© EDP Sciences, 1998
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