Sign Change of the Flux Flow Hall Effect in HTSC

Details Sign Change of the Flux Flow Hall Effect in HTSC Sign Change of the Flux Flow Hall Effect in HTSC

1995-03-15

arxiv.org/abs/cond-mat/9503082v1

Physics

Condensed Matter

12 pages Latex, no figures, submitted to PRL

Scientific paper

A novel mechanism for the sign change of the Hall effect in the flux flow region is proposed. The difference $\delta n $ between the electron density at the center of the vortex core and that far outside the vortex causes the additional contribution to the Hall conductivity $\delta\sigma_{xy}=-\delta n ec/B$. This contribution can be larger than the conventional one in the dirty case $\Delta(T)\tau <1$. If the carrier density inside the core exceeds that far outside, a double sign change may occur as a function of temperature.

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