| Issue |
Europhys. Lett.
Volume 52, Number 5, December I 2000
|
|
|---|---|---|
| Page(s) | 584 - 588 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2000-00477-3 | |
| Published online | 01 September 2002 | |
Crossovers in the out-of-plane resistivity of
superconducting 
single crystals
Département de Physique, Ecole Polytechnique Fédérale de Lausanne
CH-1015 Lausanne, Switzerland
Received:
16
May
2000
Accepted:
28
September
2000
We report the in-plane (
) and out-of-plane (
)
resistivities in the 4–800 K range on single crystals of
high-
cuprate with 
(
). 
exhibits “usual” linear behavior and
follows generally metallic-like, positive slope in the 150–400 K temperature range.
There is a clear crossover to semiconductor-like behavior close to . However, for the
first time in a chainless high- cuprate we observe a crossover above 500 K due to
hopping conduction. Under high pressures 
the magnitude of strongly
decreases, yet the slope does not change. This suggests that the out-of-plane charge
transport is governed by the interplane tunneling rate.
PACS: 74.72.Fq – Tl-based cuprates / 72.15.Eb – Electrical and thermal conduction in crystalline metals and alloys / 74.62.Fj – Pressure effects
© EDP Sciences, 2000
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