Suppression of the “Quasiclassical” Proximity Gap in Correlated-Metal–Superconductor Structures
Branislav K. Nikolić, J. K. Freericks, P. Miller
DOI 10.1103/PhysRevLett.88.077002 · Physical Review Letters
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Abstract
We study the energy and spatial dependence of the local density of states in a superconductor–correlated-metal–superconductor Josephson junction, where the correlated metal is a non-Fermi liquid (described by the Falicov-Kimball model). Many-body correlations are treated with dynamical mean-field theory, extended to inhomogeneous systems. While quasiclassical theories predict a minigap in the spectrum of a disordered Fermi liquid which is proximity-coupled within a mesoscopic junction, we find that increasing electron correlations destroy any minigap that might be opened in the absence of many-body correlations.
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| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2CuO4 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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