Open AccessSign change of the flux flow Hall effect in HTSC
Author(s) -
M. V. Feigel’man,
V. B. Geshkenbeǐn,
A. I. Larkin,
V. M. Vinokur
Publication year - 1996
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/396730
Subject(s) - vortex , sign (mathematics) , condensed matter physics , physics , hall effect , delta , electron density , flux (metallurgy) , flow (mathematics) , sigma , core (optical fiber) , electron , electrical resistivity and conductivity , chemistry , quantum mechanics , mathematics , mechanics , optics , mathematical analysis , organic chemistry , astronomy
A novel mechanism for the sign change of the Hall effect in the flux flow region is proposed. The difference {delta}{ital 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}{sub xy} = -{delta}{ital nec}/{ital B}. This contribution can be larger than the conventional one in the dirty case {Delta}{ital T}{tau} {lt} 1. If the electron density inside the core exceeds the electron density far outside, a double sign change may occur as a function of temperature
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