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Various regimes of flux motion in Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ single crystals

Weimin Chen·J. P. Franck·J. Jung
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Abstract

Four regimes of vortex motion were identified in the magnetoresistance of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ single crystals: (1) thermally activated flux flow (TAFF) in samples with surface defects caused by thermal annealing; (2) TAFF-like plastic motion of highly entangled vortex liquid at low temperatures, with $U_{pl} \sim (1-T/T_c)/H^{1/2}$; (3) pure free flux flow above the region of (2) in clean and optimally doped samples; or, in its place, (4) a combination of (2) and (3). This analysis gives an overall picture of flux motion in Bi cuprates.

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Weimin Chen, J. P. Franck, J. Jung. 2000-02-14. Various regimes of flux motion in Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ single crystals. https://doi.org/10.1016/s0921-4534(00)00856-x

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