Sign reversal of the Hall effect in superconducting YBa2(Cu1−xNix)3O7−δ single crystals
Jin-Tae Kim, J. Giapintzakis, D. M. Ginsberg
DOI 10.1103/PhysRevB.53.5922 · Physical Review B
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Abstract
For detwinned Ni-doped single crystals of YBa2(Cu1−xNix)3O7−δ with x=0.005, 0.015, and 0.035, we have measured the in-plane longitudinal and Hall resistivities. The residual resistivity ρ(T=0) extrapolated from ρ(T) above Tc increases with Ni concentration x, indicating that the elastic scattering rate of conduction carriers 1τ(T=0) is increased. In the mixed state just below the superconducting transition temperature Tc, a sign reversal of the Hall resistivity is observed. The in-plane Hall conductivity σxy is found to be the sum of two terms, C1H and C2H. C1 and C2 are independent of field as in pure YBa2Cu3O7−δ, but dependent on both temperature and Ni concentration. The temperature dependences of C1 and C2 weaken with increasing Ni concentration.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2(Cu1-xNix)3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | midpoint |
| YBa2Cu0.995Ni0.0053O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | midpoint |
| YBa2Cu0.985Ni0.0153O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | midpoint |
| YBa2Cu0.965Ni0.0353O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 77.4 | Pressure not reported | midpoint |
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