Anomalous Hall effect associated with pinning in high-κ superconductors
1991; American Physical Society; Volume: 67; Issue: 25 Linguagem: Inglês
10.1103/physrevlett.67.3618
ISSN1092-0145
Autores Tópico(s)Iron-based superconductors research
ResumoBased upon the well-known normal-core model for flux lines in high-\ensuremath{\kappa} superconductors and by correctly taking into account the backflow current due to pinning forces, we analytically derived the longitudinal resistivity ${\mathrm{\ensuremath{\rho}}}_{\mathit{x}\mathit{x}}$ and the Hall resistivity ${\mathrm{\ensuremath{\rho}}}_{\mathit{x}\mathit{y}}$ as functions of magnetic field in the region of flux flow. The present results qualitatively explain all the essential features of recent experiments on ${\mathrm{\ensuremath{\rho}}}_{\mathit{x}\mathit{y}}$. In particular, we demonstrate that the observed negative Hall resistivity at low magnetic field in certain high-${\mathit{T}}_{\mathit{c}}$ superconductors can be explained in terms of the existence of pinning forces in the sample.
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