https://doi.org/10.1140/epjb/e2003-00179-2
Normal state conduction in Gd(Ba2-xPrx)Cu3O7+δ
Magnet Research Laboratory (MRL), Department of Physics, Sharif University of Technology,
PO Box 11365-9161, Tehran, Iran
Corresponding author: a akhavan@sharif.edu
Received:
12
January
2003
Revised:
8
April
2003
Published online:
3
July
2003
The normal state resistivity of single phase polycrystalline
Gd(Ba
Prx)Cu3O
samples with 
have been investigated. There is a
distinct metal-insulator transition at 
and a superconductor-insulator
transition at 
with the increase of x. The two-dimensional variable range
hopping is dominant in the normal state resistivity of the samples. The localization
length, hopping range, and hopping energy of carriers show that Pr doping strongly
localizes the carriers in normal state, and finally causes the suppression of
superconductivity.
PACS: 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) / 74.72.Bk – Y-based cuprates / 71.30.+h – Metal-insulator transitions and other electronic transitions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
