SCALING IN ANGLE-RESOLVED ELECTRICAL-TRANSPORT MEASUREMENTS ON KAPPA-(BEDT-TTF)(2)CU(NCS)(2)

Citation
S. Friemel et al., SCALING IN ANGLE-RESOLVED ELECTRICAL-TRANSPORT MEASUREMENTS ON KAPPA-(BEDT-TTF)(2)CU(NCS)(2), Journal de physique. I, 6(12), 1996, pp. 2043-2050
Citations number
32
Categorie Soggetti
Physics
Journal title
ISSN journal
11554304
Volume
6
Issue
12
Year of publication
1996
Pages
2043 - 2050
Database
ISI
SICI code
1155-4304(1996)6:12<2043:SIAEMO>2.0.ZU;2-5
Abstract
We report on single crystal electrical transport measurements on kappa -(BEDT-TTF)(2)Cu(NCS)(2) in an external magnetic field applied at diff erent angles with respect to the superconducting layers. By measuring the in-plane resistivity versus temperature we can reveal a thermally activated behavior in the vortex liquid phase and are able to extract the angular dependence of the activation energy. Voltage versus curren t measurements lead to angle dependent values for the critical current J(c). Our data can be fitted succesfully within the framework of the anisotropic effective mass model resulting in an estimate for the anis otropy parameter gamma = xi(ab)/xi(c) approximate to 40 - 110.