Probing pseudogap by Josephson tunneling
Ivar Martin, Alexander Balatsky
DOI 10.1103/PhysRevB.62.R6124 · Physical Review B
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Abstract
We propose here an experiment aimed to determine whether there are superconducting pairing fluctuations in the pseudogap regime of the high-Tc materials. In the experimental setup, two samples above Tc are brought into contact at a single point and the differential ac conductivity in the presence of a constant applied bias voltage between the samples, V, should be measured. We argue that the pairing fluctuations will produce randomly fluctuating Josephson current with zero mean, however, the current-current correlator will have a characteristic frequency given by Josephson frequency ωJ=2eV/ħ. We predict that the differential ac conductivity and the Josephson microwave radiation should have peaks at the Josephson frequency with the width determined by the phase fluctuations time.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2212 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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