Interface superconductivity in La${}_{1.48}$Nd${}_{0.4}$Sr${}_{0.12}$CuO${}_4$/La${}_{1.84}$Sr${}_{0.16}$CuO${}_4$ bilayers

Abstract

We identify a distinct superconducting phase at the interface of a La${}_{1.48}$Nd${}_{0.4}$Sr${}_{0.12}$CuO${}_4$ (LNSCO)/La${}_{1.84}$Sr${}_{0.16}$CuO${}_4$ (LSCO) epitaxial bilayer system using ac screening measurements. A model based on inter-diffusion of quasiparticles and condensate at the interface yields a thickness of $\sim$ 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 $\alpha$ varying as $H^2$.

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Cited by in corpus (4)

• Role of the vortex-core energy on the Beresinkii-Kosterlitz-Thouless transition in thin films of NbN
• Liquid crystal phases of two-dimensional dipolar gases and Berezinskii-Kosterlitz-Thouless melting
• Electronic reconstruction and enhanced superconductivity at La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$/La${}_{1.55}$Sr${}_{0.45}$CuO${}_4$ bilayer interface
• Berezinskii-Kosterlitz-Thouless Renormalization Group Flow at a Quantum Phase Transition