Flux-flow Hall effect in superconducting Tl2Ba2CaCu2O8 films
S. J. Hagen, C. J. Lobb, R. L. Greene, M. Eddy
DOI 10.1103/PhysRevB.43.6246 · Physical Review B
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Abstract
In both high-Tc and low-Tc superconductors, the Hall effect in the mixed state often shows a sign reversal below Tc that contradicts standard theories for flux-vortex motion. We have measured the mixed-state Hall effect in high-quality superconducting films of Tl2Ba2CaCu2O8, and find that the Hall angle α below Tc consists of two components: A field-independent component exhibits a complicated temperature dependence, including a sign change near Tc, while a second component with very weak temperature dependence is linear in field and resembles the normal-state Hall angle. The field independence of the sign-reversing component is evidence for vortex motion, and can be understood in terms of simple drag forces acting on vortices.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 104 | Pressure not reported | midpoint |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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