Charge-Kondo Effect in Mesoscopic Superconductors Coupled to Normal Metals

Details Charge-Kondo Effect in Mesoscopic Superconductors Coupled to Normal Metals Charge-Kondo Effect in Mesoscopic Superconductors Coupled to Normal Metals

2011-07-03

arxiv.org/abs/1107.0481v1

Phys. Rev. B 84, 085121 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

17 pages, 4 figures; submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.84.085121

We develop a theoretical proposal for the charge Kondo effect in mesoscopic normal-superconductor-normal heterostructures, where the superconducting gap exceeds the electrostatic charging energy. Charge-Kondo correlations in these devices alter the conventional temperature-dependence of Andreev reflection and electron cotunneling. We predict typical Kondo temperatures of $\gtrsim 10 {\rm mK}$, and suggest experimental architectures that combine superconducting charge-qubits with semiconducting nanowires at cryogenic temperatures.

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