Direct numerical confirmation of pinning-induced sign change in the superconducting Hall effect in type-II superconductors
Noriyuki Nakai, Nobuhiko Hayashi, Masahiko Machida
DOI 10.1103/PhysRevB.83.024507 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Using the time-dependent Ginzburg-Landau equation with the complex relaxation time and the Maxwell equation, we systematically examine transverse motion of vortex dynamics in the presence of pinning disorders. Consequently, in the plastic flow phase in which moving and pinned vortices coexist, we find that the Hall voltage can generally change its sign. The origin of the sign change is ascribed to the fact that moving vortices are caused to strongly drift by the circular current of pinned vortices and the enforced transverse moving direction becomes opposite to that of the transport current. This suggests that the Hall sign change is a behavior common in all disordered type-II superconductors. In this paper, we discuss conditions to observe such an intrinsic effect and explain experimental results reported in the literature on the basis of this effect.
Similar papers
Direct Numerical Confirmation of Pinning Induced Sign Change in Superconducting Hall Effect in Type-II Superconductors
similarity 0.95N. Nakai et al. · 2009 · arXiv:0908.2864
Source status unknown — claims are unverified
Sign reversal of the mixed-state Hall resistivity in type-II superconductors
similarity 0.94B. Y. Zhu et al.
Source status unknown — claims are unverified