Issue |
Europhys. Lett.
Volume 36, Number 9, December III 1996
|
|
---|---|---|
Page(s) | 681 - 686 | |
Section | Atomic, molecular and optical physics | |
DOI | https://doi.org/10.1209/epl/i1996-00286-8 | |
Published online | 01 September 2002 |
Dimensionality crossover in the transport behavior of the quasi–one-dimensional conductor H2(phthalocyanine)I
1
Department of Physics and Astronomy,
Northwestern University, Evanston, IL 60208, USA
2
Department of Chemistry, and Materials Research Center,
Northwestern University, Evanston, IL 60208, USA
3
Institut für Theorie der Kondensierten Materie,
Universität Karlsruhe, 76128 Karlsruhe, Germany
Received:
29
February
1996
Accepted:
1
November
1996
Electrical-transport measurements are reported on high-purity
single crystals and their alloys with
in the temperature range
from room temperature to 20 mK and in magnetic fields up to 5.5 T.
We have observed a sharp maximum in conductivity at 1.8 K which we attribute
to crossover from one- to three-dimensional behavior. The conductivity
follows a simple
quadratic temperature dependence below 1.8 K and remains metallic
(
) at very low temperatures. A
negative contribution to
the magnetoresistance appears at 1.8 K consistent with weak-localization
theory.
PACS: 36.20.Fz – Constitution (chains and sequences) / 73.20.Fz – Weak localization effects (e.g., quantized states)
© EDP Sciences, 1996
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