Quantitative analysis of Josephson-quasiparticle current in superconducting single-electron transistors.

Abstract

We have investigated Josephson-quasiparticle (JQP) current in superconducting single-electron transistors in which charging energy ${\mathit{E}}_{\mathit{C}}$ was larger than superconducting gap energy \ensuremath{\Delta} and junction resistances were much larger than ${\mathit{R}}_{\mathit{Q}}$\ensuremath{\equiv}h/4${\mathit{e}}^{2}$. We found that not only the shapes of the JQP peaks but also their absolute height were reproduced quantitatively with a theory by Averin and Aleshkin using a Josephson energy of Ambegaokar-Baratoff's value. \textcopyright{} 1996 The American Physical Society.