Scaling of Nonlinear Longitudinal and Hall Resistivities near the Vortex Glass Transition

Abstract

We show that the longitudinal current-voltage characteristics of superconductors in mixed state have the general form of extended power law. Isotherms simulated from this nonlinear equation fit the experimental I-V data of Strachan et al. [ Phys. Rev. Lett. {\bf 87}, 067007 (2001)]. We determine the average pinning force in the flux creep and strong pinning regime and discuss both the puzzling scaling behavior ${\rho }_{xy}\propto {\rho }_{xx}^{\beta }$ and a recently found new scaling relationship of nonlinear Hall resistivity ${\rho }_{xy}(T)$.

5 pages, 5 figures