Title: Transport properties of the underdoped Y0.5Pr0.5Ba2Cu3O7-delta films in high magnetic fields
Authors: Hao, Z
Zhao, BR
Zhu, Bei Yi
Zhao, ZX
Vanacken, Johan
Moshchalkov, Victor #
Issue Date: Apr-2002
Publisher: E d p sciences
Series Title: Europhysics letters vol:58 issue:1 pages:105-111
Abstract: The effect of magnetic field and disorder on the transport properties of the underdoped Y0.5Pr0.5Ba2Cu3O7 films has been investigated in a broad temperature range in magnetic fields up to 50 T. In ultrathin films with strong disorder, where the mean free path iota corresponds to k(F)iota < 4, a convincing power law resistivity vs. temperature &rho;(ab) &SIM; T-2&gamma; (&gamma; = 0.31-0.39) is observed in a very broad temperature range T &AP; 2-40 K. However, in superconducting thicker films with much weaker disorder (k(F)&iota; > 14 in normal state), the high magnetic field, by suppressing superconductivity, recovers the normal-state transport behavior with the rho(ab) similar to ln T-dependence at low temperature in similar to50 T field. The two different transport behaviors indicate that the normal-state transport properties of the underdoped cuprates are very sensitive not only to the hole concentration but also to the degree of the disorder.
ISSN: 0295-5075
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
# (joint) last author

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