Interface superconductivity in La$_{1.48}$Nd$_{0.4}$Sr$_{0.12}$CuO$_{4}$/La$_{1.84}$Sr$_{0.16}$CuO$_{4}$ bilayers

  title={Interface superconductivity in La\$\_\{1.48\}\$Nd\$\_\{0.4\}\$Sr\$\_\{0.12\}\$CuO\$\_\{4\}\$/La\$\_\{1.84\}\$Sr\$\_\{0.16\}\$CuO\$\_\{4\}\$ bilayers},
  author={P. K. Rout and Ramesh C. Budhani},
  journal={Physical Review B},
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… 
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    Lorentzians were rejected because of the significant peak area associated with tails outside the transition region