Interface superconductivity in La1.48Nd0.4Sr0.12CuO4/La1.84Sr0.16CuO4 bilayers
P. K. Rout, R. C. Budhani
DOI 10.1103/PhysRevB.82.024518 · Physical Review B
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Abstract
We identify a distinct superconducting phase at the interface of a La1.48Nd0.4Sr0.12CuO4/La1.84Sr0.16CuO4 epitaxial bilayer system using ac screening measurements. A model based on interdiffusion of quasiparticles and condensate at the interface yields a thickness of ∼25 nm for the interfacial layer. Two-dimensional superconductivity of the interface layer appears to be governed by Kosterlitz-Thouless-Berezinskii transition. A parallel magnetic field suppresses the superconducting transition temperature of this layer with a pair-breaking parameter α varying as H2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.9Sr0.1CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 49 | Pressure not reported | unknown |
| La1.85Sr0.16CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31.2 | Pressure not reported | onset |
| La1.85Sr0.16CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 19.9 | Pressure not reported | onset |
| La1.48Nd0.4Sr0.12CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.1 | Pressure not reported | onset |
| La1.48Nd0.4Sr0.12CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.5 | Pressure not reported | onset |
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