Correlation between longitudinal and Hall resistivity in superconductor films
X.-M. Zhu, E. B. Nyeanchi
DOI 10.1103/PhysRevB.64.012508 · Physical Review B
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Abstract
We analyze both the longitudinal and Hall resistivity of YBa2Cu3O7 films near the transition temperature in a magnetic field. We demonstrate that the longitudinal resistivity suggests that certain features of the Kosterlitz-Thouless transition of a vortex lattice are preserved, although the transition never fully reached critical. Instead, our experimental results fit well with a mean-field dislocation unbinding transition. We make use of the two characteristic properties of a two-dimensional dislocation unbinding transition, the number of free dislocations, and the “dielectric function” for the residual correlation between the unbound dislocation pairs. By using these two parameters, we show that both the longitudinal and Hall resistivity as functions of temperature and magnetic field can be interpreted simultaneously.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88 | Pressure unresolved | zero_resistance |
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