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arXiv · 1001.3853

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

J. P. Pekola·V. F. Maisi·S. Kafanov·N. Chekurov·A. Kemppinen·Yu. A. Pashkin·O. -P. Saira·M. Mottonen·J. S. Tsai
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Abstract

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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J. P. Pekola, V. F. Maisi, S. Kafanov, N. Chekurov, A. Kemppinen, Yu. A. Pashkin, O. -P. Saira, M. Mottonen, J. S. Tsai. 2010-08-06. Photon assisted tunneling as an origin of the Dynes density of states. https://doi.org/10.1103/physrevlett.105.026803

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