Sign reversal of the mixed-state Hall resistivity in type-II superconductors
B. Y. Zhu, D. Y. Xing, Z. D. Wang, B. R. Zhao, Z. X. Zhao
DOI 10.1103/PhysRevB.60.3080 · Physical Review B
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Abstract
Taking into account pinning, thermal fluctuations, and vortex-vortex interactions, we develop a unified theory to explain the sign reversal of the mixed-state Hall resistivity ρxy in both high-Tc and low-Tc superconductors. Molecular dynamics simulations show that besides the pinning forces, either the thermal fluctuations in the high-Tc superconductors or the vortex-vortex interactions in the low-Tc ones play an important role in the sign reversal of ρxy. From a calculated phase diagram for vortex motion, we find that the abnormal Hall effect always occurs in the plastic flow state of vortices.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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