Photon assisted tunneling as an origin of the Dynes density of states

Details Photon assisted tunneling as an origin of the Dynes density of states Photon assisted tunneling as an origin of the Dynes density of states

2010-01-21

arxiv.org/abs/1001.3853v3

Phys. Rev. Lett. 105, 026803 (2010)

Physics

Condensed Matter

Superconductivity

4+3 pages, 4 figures; updated to the published version, includes EPAPS supplementary material

Scientific paper

We show that the effect of a high-temperature environment in current transport through a normal metal-insulator-superconductor tunnel junction can be described by an effective density of states (DOS) in the superconductor. In the limit of a resistive low-ohmic environment, this DOS reduces into the well-known Dynes form. Our theoretical result is supported by experiments in engineered environments. We apply our findings to improve the performance of a single-electron turnstile, a potential candidate for a metrological current source.

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