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Sign Change of the Flux Flow Hall Effect in HTSC

M. V. Feigel'man, V. B. Geshkenbein, A. I. Larkin, V. M. Vinokur

cond-matarXiv:cond-mat/9503082

Abstract

A novel mechanism for the sign change of the Hall effect in the flux flow region is proposed. The difference δn 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 δσxy=-δn ec/B. This contribution can be larger than the conventional one in the dirty case Δ(T)τ<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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