Non-Ohmic Hall resistivity observed above the critical temperature in the high-temperature superconductor YBa2Cu3O7−δ
I. Puica, W. Lang, K. Siraj, J. D. Pedarnig, D. Bäuerle
DOI 10.1103/PhysRevB.79.094522 · Physical Review B
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Abstract
Investigations of the resistivity and the Hall effect as a function of electric field and temperature in the normal state and upper part of the superconducting transition of an optimally doped very thin film of YBa2Cu3O7−δ are reported. Using a fast pulsed-current technique allowed to reduce the self-heating of the sample and to reach electric fields up to 1 kV/cm. An intrinsic non-Ohmic behavior of the Hall conductivity above the critical temperature that appears to originate from two different partially counteracting effects is revealed. The major contribution stems from the suppression of Aslamazov-Larkin superconducting fluctuations in high electric fields.
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. | 86.8 | Pressure not reported | unknown |
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